[bpgui]

All of the sudden, all of my calendar entries disappeared. I didn't install anything or change any settings. I've logged into outlook.com on my PC and they are still there, just no longer syncing to my phone. Any idea why?

[seraphim19]

There are different toggles in the calendar settings for the calendars that are associated to the accounts you've set up on the phone. Check there to see if its disabled.

Or you may have changed your outlook password and not updated it on your phone. Check in the settings > accounts for a 'attention needed' notification next to your outlook account.

[bpgui]

Nope. None of those, but the entries magically reappeared. I'm assuming the phone just lost connection with the microsoft account.