After days of frustration and several removes, deletes, resets, etc, I tried the unrestricted thing and also moved the account to first in the list of multiple accounts and everything started working fine. Went 2 days without it turning "sync calendars" off. Miracle!!! I was actually thinking I had the solution - silly me.
I use DigiCal to display my agenda and add events. Since making the above changes, I added my first event today using DigiCal and the minute I hit save, all my events went away in the display and the setting had been turned off. I turned it back on and synced. Now only recurring events are showing up in the DigiCal display even though one time events are still in my Outlook calendar. I've tried refresh on DigiCal, resync on Google accounts, rebooting my phone, etc... Nothing gets my one time events to display - this is a regression from before. At least when I turned the sync setting back on before everything would display.
I tried repeating "add event" to see if it changes the setting and could not repeat it.
Good grief Microsoft - fix this!!! At a minimum, tell us how to revert to an older version. I only seem able to get the one on the Playstore which is severely broken. Or put the older version back on the Playstore - something - anything - please!
Pixel 6
Android 13
MS Outlook for Android - 4.2311.1
DigiCal 2.2.18