Thanks for your help. I agree that isolation is important, but i think it already is. To clarify. My wife runs a third party calendar app on her iphone, but she is not syncing that with her mac (we still haven't figured out how to do that on a mac, the provider may only provide syncing with outlook on a pc). Right now we imported an outlook calendar into outlook on the mac and then she manually updates the calendar (our goal is to be able to share calendars between our two computers). On her mac in My Calendars, she has two calendars. One is "office365" which has quite a number of colored categories. Below that is "on My Computer" which is empty. The office 365 calendar is not fully publishing through exchange to my pc (where i have subcribed to her shared calendar in Outlook). I can't really understand /figure out why some appointments seem to get published while other don't. It doesn't appear to be based on "category". New items seem to publish fine. But some old items just don't. Even if i change them slightly (date, category) and resave.
It might be items that were added the oldest (i.e. a long while back on the calendar we imported) that may be the problem. But not sure. The real issue is that we can't "trust" the calendar because it is inconsistent.
Thoughts on how to force outlook on the mac to check all the items in its calendar to make sure they have published?