I just installed Fedora for the first time. I successfully connected to office365 online account in my company organization. Admin granted all the permissions for me.
My account is not syncing, for the most part. I only see files from OneDrive are being synced. Other things like email and calendar are not being synced.
My system is fully updated.
Reboot did not help.
I’m using official Gnome apps: Geary mail client (rpm) and default Calendar (rpm).
I’ve seen other reports here with issues connecting Microsoft to GNOME Online Accounts.
Sometimes a combination of the available options seems to have worked (e.g. Microsoft 365 for files and Microsoft Exchage for email, calendar, contacts).
If still not working, have a look at the GOA issue tracker, your issue might have already been filed: