--- title: Microsoft Defender for Office 365 Reviews meta\_title: 'Microsoft Defender for Office 365 Reviews 2026: Details, Pricing, & Features | G2' meta\_description: Filter 299 reviews by the users' company size, role or industry to find out how Microsoft Defender for Office 365 works for a business like yours. aggregate\_rating: rating\_value: 4.5 review\_count: 299 scale: '5' date\_modified: '2026-08-09' parent\_category: name: Email Security url: https://www.g2.com/categories/email-security --- ### Microsoft Defender for Office 365 Pros and Cons: Top 5 Advantages and Disadvantages #### Quick AI Summary Based on G2 Reviews Generated from real user reviews Users appreciate the **ease of use** of Microsoft Defender for Office 365, benefiting from its seamless integration within the Microsoft ecosystem. [(9 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1426149&qs=pros-and-cons#reviews) Users value **proactive threat protection** in Microsoft Defender for Office 365, blocking threats seamlessly and enhancing their security experience. [(9 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425350&qs=pros-and-cons#reviews) Users value the **proactive threat protection** of Microsoft Defender for Office 365, ensuring robust security and seamless workflow. [(8 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1426407&qs=pros-and-cons#reviews) Users appreciate the **seamless Office 365 integration** of Microsoft Defender for Office 365, enhancing security without disrupting their workflow. [(8 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425915&qs=pros-and-cons#reviews) Users value the **seamless integration** of Microsoft Defender for Office 365 with Microsoft 365, enhancing security efficiency and effectiveness. [(7 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425605&qs=pros-and-cons#reviews) Users experience frustration due to the **complexity** of configuration and policy management, hindering efficient use. [(8 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1424859&qs=pros-and-cons#reviews) Users find the **false positives** from Microsoft Defender for Office 365 disrupt workflows and complicate alert management. [(6 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1426481&qs=pros-and-cons#reviews) Users face **configuration difficulties** with Microsoft Defender for Office 365, finding it overwhelming for newcomers and administrators. [(4 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425570&qs=pros-and-cons#reviews) Users face challenges with **limited reporting** due to its complexity and lack of intuitive insights during investigations. [(4 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1424921&qs=pros-and-cons#reviews) Users criticize the **poor detection** abilities of Microsoft Defender for Office 365, leading to noise in alerting and disrupted workflows. [(3 mentions)](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425816&qs=pros-and-cons#reviews) ### 5 Pros or Advantages of Microsoft Defender for Office 365 ##### 1. Ease of Use Users appreciate the **ease of use** of Microsoft Defender for Office 365, benefiting from its seamless integration within the Microsoft ecosystem. [ See 9 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1426149&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you like about Microsoft Defender for Office 365? What I like most is that Defender for Office 365 works natively within the Microsoft 365 ecosystem, which is important for us because we manage multip SS Sarthak S. Enterprise (\> 1000 emp.) 4.0/5 "Powerful Email Security and Monitoring, but Support Needs Improvement" What do you like about Microsoft Defender for Office 365? We use this as an email security tool and to monitor alerts and incidents. What I appreciate most about Defender for Office 365 is its ability to disp ##### 2. Security Users value **proactive threat protection** in Microsoft Defender for Office 365, blocking threats seamlessly and enhancing their security experience. [ See 9 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425350&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you like about Microsoft Defender for Office 365? What I like most is that Defender for Office 365 works natively within the Microsoft 365 ecosystem, which is important for us because we manage multip ![Igor B.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Igor B.") IB Igor B. Small-Business (50 or fewer emp.) 5.0/5 "AI-Powered, Real-Time Protection That Strengthens Our Microsoft 365 Workspace" What do you like about Microsoft Defender for Office 365? Microsoft Defender for Office 365 is essentially a high-tech “bouncer” for your digital workspace. While basic email filtering through Exchange Online ##### 3. Email Security Users value the **proactive threat protection** of Microsoft Defender for Office 365, ensuring robust security and seamless workflow. [ See 8 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1426407&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you like about Microsoft Defender for Office 365? What I like most is that Defender for Office 365 works natively within the Microsoft 365 ecosystem, which is important for us because we manage multip RS Raghav S. Mid-Market (51-1000 emp.) 4.5/5 "Robust Protection and Seamless Office 365 Integration" What do you like about Microsoft Defender for Office 365? What I appreciate most is its robust protection against phishing and malware. The integration with Office 365 is smooth, eliminating the need for addi ##### 4. Office 365 Integration Users appreciate the **seamless Office 365 integration** of Microsoft Defender for Office 365, enhancing security without disrupting their workflow. [ See 8 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425915&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you like about Microsoft Defender for Office 365? What I like most is that Defender for Office 365 works natively within the Microsoft 365 ecosystem, which is important for us because we manage multip RS Raghav S. Mid-Market (51-1000 emp.) 4.5/5 "Robust Protection and Seamless Office 365 Integration" What do you like about Microsoft Defender for Office 365? What I appreciate most is its robust protection against phishing and malware. The integration with Office 365 is smooth, eliminating the need for addi ##### 5. Integrations Users value the **seamless integration** of Microsoft Defender for Office 365 with Microsoft 365, enhancing security efficiency and effectiveness. [ See 7 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425605&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you like about Microsoft Defender for Office 365? What I like most is that Defender for Office 365 works natively within the Microsoft 365 ecosystem, which is important for us because we manage multip RS Raghav S. Mid-Market (51-1000 emp.) 4.5/5 "Robust Protection and Seamless Office 365 Integration" What do you like about Microsoft Defender for Office 365? What I appreciate most is its robust protection against phishing and malware. The integration with Office 365 is smooth, eliminating the need for addi ### 5 Cons or Disadvantages of Microsoft Defender for Office 365 ##### 1. Complexity Users experience frustration due to the **complexity** of configuration and policy management, hindering efficient use. [ See 8 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1424859&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you dislike about Microsoft Defender for Office 365? The biggest challenge is that configuration is spread across multiple portals, which can be confusing even for experienced admins. In MSP scenarios, i ![Igor B.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Igor B.") IB Igor B. Small-Business (50 or fewer emp.) 5.0/5 "AI-Powered, Real-Time Protection That Strengthens Our Microsoft 365 Workspace" What do you dislike about Microsoft Defender for Office 365? While Microsoft Defender for Office 365 is a powerhouse for anyone already in the Microsoft ecosystem, it’s not without its frustrations. The least he ##### 2. False Positives Users find the **false positives** from Microsoft Defender for Office 365 disrupt workflows and complicate alert management. [ See 6 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1426481&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you dislike about Microsoft Defender for Office 365? The biggest challenge is that configuration is spread across multiple portals, which can be confusing even for experienced admins. In MSP scenarios, i RS Raghav S. Mid-Market (51-1000 emp.) 4.5/5 "Robust Protection and Seamless Office 365 Integration" What do you dislike about Microsoft Defender for Office 365? At times, the advanced settings may seem somewhat complicated for newcomers, and setting everything up initially can be time-consuming. Additionally, ##### 3. Configuration Difficulties Users face **configuration difficulties** with Microsoft Defender for Office 365, finding it overwhelming for newcomers and administrators. [ See 4 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425570&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you dislike about Microsoft Defender for Office 365? The biggest challenge is that configuration is spread across multiple portals, which can be confusing even for experienced admins. In MSP scenarios, i KV Khushwant V. Enterprise (\> 1000 emp.) 5.0/5 "Proactive Threat Protection That Secures Email Effortlessly" What do you dislike about Microsoft Defender for Office 365? The main drawback is the complexity of configuration and policy management, which can be overwhelming for new administrators. Occasionally, false posi ##### 4. Limited Reporting Users face challenges with **limited reporting** due to its complexity and lack of intuitive insights during investigations. [ See 4 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1424921&qs=pros-and-cons#reviews) See Related User Reviews ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Mid-Market (51-1000 emp.) 4.0/5 "Strong built-in email protection for Microsoft 365 tenants we manage" What do you dislike about Microsoft Defender for Office 365? The biggest challenge is that configuration is spread across multiple portals, which can be confusing even for experienced admins. In MSP scenarios, i KV Khushwant V. Enterprise (\> 1000 emp.) 5.0/5 "Proactive Threat Protection That Secures Email Effortlessly" What do you dislike about Microsoft Defender for Office 365? The main drawback is the complexity of configuration and policy management, which can be overwhelming for new administrators. Occasionally, false posi ##### 5. Poor Detection Users criticize the **poor detection** abilities of Microsoft Defender for Office 365, leading to noise in alerting and disrupted workflows. [ See 3 mentions ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews?filters%5Bsentiment_snippet%5D=1425816&qs=pros-and-cons#reviews) See Related User Reviews ![Verified User](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User") U Verified User Enterprise (\> 1000 emp.) 3.5/5 "Microsoft Defender" What do you dislike about Microsoft Defender for Office 365? 1- False Positives Can occasionally flag older medical imaging software, pathology systems, or lab device drivers as suspicious, disrupting workflo ![Ahimsv G.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Ahimsv G.") AG Ahimsv G. Mid-Market (51-1000 emp.) 4.5/5 "Bit complex at start but worth it" What do you dislike about Microsoft Defender for Office 365? Defender for office 365 has a lot good for it, but on other hand there are a few areas that could use improvement like the user interface can feel a b ## Top-Rated Alternatives [ ![Proofpoint Core Email Protection](https://images.g2crowd.com/uploads/product/hd_favicon/8adf2eedd5616a9f5e200c4520f6d30d/proofpoint-core-email-protection.svg "Proofpoint Core Email Protection") Proofpoint Core Email Protection 4.6/5(601) ](https://www.g2.com/products/proofpoint-core-email-protection/reviews) [ ![SpamTitan Email Security](https://images.g2crowd.com/uploads/product/hd_favicon/1553620140/spamtitan-email-security.svg "SpamTitan Email Security") SpamTitan Email Security 4.5/5(199) ](https://www.g2.com/products/spamtitan-email-security/reviews) [ ![Symantec Email Security.Cloud](https://images.g2crowd.com/uploads/product/hd_favicon/7e0271a147c13a70a6587f9586b454a0/symantec-email-security-cloud.png "Symantec Email Security.Cloud") Symantec Email Security.Cloud 4.1/5(67) ](https://www.g2.com/products/symantec-email-security-cloud/reviews) [ View All Alternatives ](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/competitors/alternatives) ![Adesh T.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Adesh T.") AT Adesh T. Manager ( Head IT Infra & Cyber Security ) Mid-Market (51-1000 emp.) 6/14/2026 "Built-In Defender Policies Strengthen Office 365 Security" 4/5 What do you like best about Microsoft Defender for Office 365? Defender is provide inbuild policies to us for securing our office 365 users, and applications, including emails, accouts, oneDrive and MS teams. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? Email Security is not properly working in Defender, as some times we found glitch in spam filtering. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? Phishing Attacks: Detects and blocks malicious emails designed to steal credentials. Malware & Ransomware: Uses Safe Attachments to sandbox suspicious files before delivery. Malicious Links: Safe Links rewrites URLs in emails and documents, scanning them in real time to prevent users from clicking harmful sites. Spam & Junk Filtering: Reduces clutter and risk by filtering unwanted or suspicious messages. Zero-Day Threats: Leverages AI and machine learning to detect new, unknown attack patterns. Incident Response: Provides automated remediation tools to contain and remove threats quickly. Review collected by and hosted on G2.com. Show More Current UserValidated ReviewerSource: Organic Review from User Profile ![Aravinda S.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Aravinda S.") AS Aravinda S. Desktop Support Engineer Mid-Market (51-1000 emp.) 6/8/2026 "Effective Email Security with Excellent Microsoft 365 Integration" 4.5/5 What do you like best about Microsoft Defender for Office 365? I love Microsoft Defender for Office 365 for its excellent protection against phishing attacks. The Safe Links feature really helps prevent users from opening malicious websites, and the Safe Attachments scans files effectively before delivery. I also appreciate the seamless integration from a centralized console, which means I can manage everything easily. The threat investigation and reporting tools are very useful, offering valuable insights and protection from accidental clicks and downloads. Plus, the solution scaled well for our environment, managing email security efficiently across the organization. Integration within the Microsoft ecosystem is also a big plus, and setting it up was straightforward since we already use Microsoft 365. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? Advanced policy configuration has a learning curve. Reporting and dashboards can feel complex for new administrators. Sometimes legitimate emails are flagged and require review. Security settings are spread across multiple portals. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? I find Microsoft Defender for Office 365 protects against phishing, malware, and spam attacks. Safe links prevent access to malicious sites, and safe attachments scan files before opening. It reduces risks of malware and ransomware, improving email security and protecting users from harmful links and unwanted emails. Review collected by and hosted on G2.com. Show More Validated ReviewerSource: Organic HS Hemant S. Manger Legal Services Mid-Market (51-1000 emp.) 6/18/2026 "Effective Email Security, Complex Dashboard" 4/5 What do you like best about Microsoft Defender for Office 365? I like that Microsoft Defender for Office 365 is an inbuilt Windows tool that acts as a default antivirus for computers and laptops. I find the features like Safe Links and Safe Attachments work effectively, providing an extra layer of protection. These features give warnings while opening suspicious links or attachments that may contain hidden malware or viruses, protecting my system from potential threats. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? The interface and the reporting dashboard can sometimes feel complex. Improving the usability and making the UI more user-friendly can definitely help in resolving the issue. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? I use Microsoft Defender for Office 365 to protect email from phishing, malware, and spam, and safeguard my system from viruses and IT threats, including hacking and ransomware. It secures my personal data and provides an extra layer of protection with features like safe links and attachments to warn against suspicious content. Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite ![Andy W.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Andy W.") AW Andy W. Cybersecurity Specialist & Technical Support Mid-Market (51-1000 emp.) 2/24/2026 "Strong built-in email protection for Microsoft 365 tenants we manage" 4/5 What do you like best about Microsoft Defender for Office 365? What I like most is that Defender for Office 365 works natively within the Microsoft 365 ecosystem, which is important for us because we manage multiple client tenants in an MSP environment. We don’t need additional gateways or extra infrastructure, and we can deploy policies directly through the Microsoft security portals. Safe Links and Safe Attachments help reduce phishing risk significantly, and Threat Explorer is especially helpful when we’re investigating suspicious emails that users report. From an admin perspective, having everything connected to Microsoft logs, audit trails, and incident response workflows makes investigations much faster than when using external email security tools. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? The biggest challenge is that configuration is spread across multiple portals, which can be confusing even for experienced admins. In MSP scenarios, it also takes time to tune policies correctly—especially anti-phishing and impersonation protection—so you can avoid false positives for clients with different email patterns. Another pain point is licensing complexity: explaining the differences between Defender Plan 1, Plan 2, and E5 security features to clients isn’t always straightforward. Reporting is powerful, but it can still take several clicks to reach the exact information you need during an investigation. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? In our environment, Defender for Office 365 primarily helps us reduce phishing incidents, malicious attachments, and the risk of account compromise across the multiple Microsoft 365 tenants we support. Before we enabled the more advanced policies, users often forwarded suspicious emails to IT, and our investigations were much more manual. With Defender in place, we can quickly trace a message, review the detections, and confirm whether similar emails were delivered to other users. It also helps us respond faster to potential mailbox compromise cases, since Safe Links data, message traces, and security alerts are available within the same ecosystem. From an MSP support perspective, this improves both our response time and our clients’ overall security posture, without needing an additional third-party email gateway. Review collected by and hosted on G2.com. Show More Current UserValidated ReviewerSource: Organic ![Youssef B.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Youssef B.") YB Youssef B. Senior IT & Business Management Enterprise (\> 1000 emp.) 5/4/2026 "Strong Real-Time Protection, but Alerts and Policy Tuning Take Time" 3.5/5 What do you like best about Microsoft Defender for Office 365? I like that Microsoft Defender for Office 365 delivers strong, real-time protection without creating extra work for me. Its automated threat detection, Safe Links, and email scanning make it straightforward to keep our environment secure and stay on top of potential threats. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? I don’t like that Microsoft Defender for Office 365 can generate too many alerts, including false positives. Some features also feel a bit complicated to configure, and it takes time to fine-tune the policies so they work the way I need. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? Microsoft Defender for Office 365 helps block phishing, malware, and unsafe links before they ever reach users. It lowers overall security risk, reduces the need for manual investigation, and provides clearer visibility into threats across email and collaboration tools. Review collected by and hosted on G2.com. Show More 5/7/2026 Validated ReviewerIncentivizedSource: G2 invite ![Igor B.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Igor B.") IB Igor B. Customer engineer Small-Business (50 or fewer emp.) 2/17/2026 "AI-Powered, Real-Time Protection That Strengthens Our Microsoft 365 Workspace" 5/5 What do you like best about Microsoft Defender for Office 365? Microsoft Defender for Office 365 is essentially a high-tech “bouncer” for your digital workspace. While basic email filtering through Exchange Online Protection handles the obvious spam, Defender for Office 365 goes further by using AI and “sandboxing” to catch more sophisticated attacks that are designed to look legitimate. For me, the most helpful aspects and upsides come down to three main pillars: real-time verification, automation, and cross-platform security. Together, these are what make it feel like more than just another filter, and more like an added layer of protection across the workspace. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? While Microsoft Defender for Office 365 is a powerhouse for anyone already in the Microsoft ecosystem, it’s not without its frustrations. The least helpful parts tend to come down to its complexity, its “black box” feel, and the friction it can create for legitimate users trying to get their work done. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? Beyond simply “stopping spam,” it also tackles broader, systemic risks that could otherwise lead to financial loss, legal liability, and operational downtime. Review collected by and hosted on G2.com. Show More Validated ReviewerSource: Organic ![Adrián F.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Adrián F.") AF Adrián F. Jefe del Lab. Informática Mid-Market (51-1000 emp.) 6/24/2026 "Useful and reliable protection and security functions" 5/5 What do you like best about Microsoft Defender for Office 365? The protection and security features offered by the application seem very useful and reliable to me. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? The price is high to access the advanced features, and I have also noticed some false positives. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? The protection of email and monitoring against malware. Review collected by and hosted on G2.com. Show More Current UserValidated ReviewerSource: OrganicAI Translated ![Jesus Alberto G.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Jesus Alberto G.") JG Jesus Alberto G. admission specialist Education Management Small-Business (50 or fewer emp.) 6/28/2026 "all in on MD 365 BUILT FOR RESILENCE AND SIMPLICITY" 2/5 What do you like best about Microsoft Defender for Office 365? Integrated Email ProtectionEmail Encryptionans spam malware protection Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? Overly Strict Filtering: Can occasionally flag or block legitimate URLs and websites that lack valid SSL certificat Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? before i was using 3 app for the same purpose now only md365 Review collected by and hosted on G2.com. Show More Current UserValidated ReviewerSource: Organic KV Khushwant V. IT Security Apprentice Enterprise (\> 1000 emp.) 11/26/2025 "Proactive Threat Protection That Secures Email Effortlessly" 5/5 What do you like best about Microsoft Defender for Office 365? Its proactive threat protection is the standout feature. Safe Links and Safe Attachments ensure malicious content is blocked before reaching users, while real-time threat intelligence keeps defenses updated. Automated investigation and response save time and reduce manual workload, making it a robust solution for securing email and collaboration tools. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? The main drawback is the complexity of configuration and policy management, which can be overwhelming for new administrators. Occasionally, false positives occur, requiring manual review. Additionally, reporting dashboards could be more intuitive for quicker insights. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? It solves the challenge of protecting email and collaboration platforms from phishing, malware, and zero-day threats. By providing Safe Links, Safe Attachments, and automated threat response, it minimizes security risks and reduces manual intervention. This ensures a safer communication environment, improves compliance, and saves time for IT teams, ultimately enhancing organizational security and productivity. Review collected by and hosted on G2.com. Show More Current UserValidated ReviewerSource: Organic BA Basit A. Security Analyst Mid-Market (51-1000 emp.) 8/29/2025 "Robust Email and Collaboration Security with Microsoft Defender for Office 365" 4.5/5 What do you like best about Microsoft Defender for Office 365? My favorite thing about Microsoft Defender for Office 365 is its threat protection. It has excellent protections against phishing, ransomware, and zero-day exploits through real-time scanning of emails and attachments. I also like how natively integrated it is into Outlook, Teams, SharePoint, and OneDrive—so protection covers all collaboration platforms without having to set anything up. Another great benefit of the automated investigation and response (AIR) feature is that it minimizes manual work for security teams and accelerates incident response. My favorite feature of Microsoft Defender for Office 365 is its advanced threat protection. It ensures robust protection against phishing, ransomware, and zero-day attacks by scanning attachments and emails in real time. I also enjoy how easily it integrates into Outlook, Teams, SharePoint, and OneDrive—so protection is applied to all the collaboration tools without additional configuration. The automated investigation and response (AIR) capability is another huge plus, as it reduces security teams' manual workload and accelerates incident response. Review collected by and hosted on G2.com. What do you dislike about Microsoft Defender for Office 365? The setup and policy configuration can be complex, and it sometimes generates false positives by flagging safe emails as threats. Some advanced features are also locked behind higher-tier plans, which can be costly for smaller organizations. Review collected by and hosted on G2.com. What problems is Microsoft Defender for Office 365 solving and how is that benefiting you? Microsoft Defender for Office 365 is addressing the issue of phishing, ransomware, and malicious attachments by preventing them from reaching users. It also protects collaboration tools such as Teams and SharePoint, and automated investigation and response save admins' time. This enhances overall security, lowers risks, and enables us to work more confidently and productively. Review collected by and hosted on G2.com. 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