itrezzo provides enterprise software that enhances employee productivity for any company running Microsoft Exchange Server. As one of the first third-party developers for BlackBerry in 2001, itrezzo has a long list of clients ranging from government agencies to large scale enterprise businesses. Companies and agencies using itrezzo profit from the cost-saving and productivity enhancement that comes with the automation of contact and calendar sync to smartphones. Based in San Jose California, itrezzo continues to develop quality software for Microsoft users.