CalDAVconnect

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CalDAVconnect is a cloud-based sync bridge that connects your CalDAV server to Google Calendar or Microsoft 365 - bidirectionally, in near real-time, without per-device setup. Most CalDAV users face the same problem: Google and Microsoft don't speak CalDAV as a server. That means events created in Google Calendar don't appear in Nextcloud, and vice versa - unless you set up cron jobs, live with 30-minute polling delays, or give up on one side entirely. CalDAVconnect solves this at the infrastructure level. It uses webhooks for changes coming from Google Calendar and Microsoft 365 (1–2 seconds) and efficient CTag-based polling for changes going the other way (7–8 seconds on average). No full calendar scans. No per-device configuration. Tested and working with: Nextcloud, SOGo, Radicale, Baïkal, Synology Calendar, Infomaniak, Posteo, mailbox.org. Hosted in Germany (Hetzner Nuremberg), AES-256-GCM encryption, GDPR-compliant with DPA available.