Comment by aetherspawn

I’m going to float a compromise that works pretty well and helped us get off Office with absolutely minimal effort…

Exchange Online Plan 1 (the cheapest, no Office)

Apple Mail (Active Sync), Pages, Numbers, Keynote (all free, perpetually, and mobile apps are available)

Since these are packaged as store apps, we still get basic MDM and the ability to deploy/autoconfigure/autoupdate. Active Sync allows us to get email notifications in near real-time to mobile devices (which is otherwise difficult), as well as wipe emails remotely on lost devices if we need to.

We get data sovereignty by using a Synology NAS, which has a Task to encrypt everything and upload it to Cloudflare R2 as a backup. We could really use any NAS solution, but so far Synology is hands free and can sync everyone’s emails from Exchange to the backup.

Will ditch Exchange when someone finally starts an antitrust on Microsoft/Google email hosting.