k9mail, Happy Monday K-9 Mail family! We just released version 6.201, which adds support for using OAuth 2.0 with Office365 accounts.
The update is available on Google Play right now, and will be up at F-Droid shortly.
For guides, a full list of changes, or to download the APK directly, go here: https://forum.k9mail.app/t/new-release-k-9-mail-6-201/5090
Thanks!