What I did: used to have access to my office365 calendar from Agenda (the calendar is displayed by the iOS calendar just fine)
What happened: lost access, gmail calendars appear still and can be selected, but office calendar does not appear on the list to add to agenda
What I expected:
Things that might be helpful to know (Agenda version, OS and model, etc): iOS iPad professional
I tried restart, poke around the setting, to no avail.