One of my users encountered the following problem today.
For an unknown reason, a second calendar has been created on his Exchange account, and set as default. After this happened, all new meeting invites sent to this user ended up on this new calendar. Under "My Calendars", I can see both the original calendar (which contains all appointments prior to today) and the new calendar which contains the appointments he received today.
I cannot delete the new calendar or rename it. When I right-click on it, options to delete or rename are grayed out.
Options to delete or rename the original calendar are available in the right-click menu.
I attempted exporting the original calendar and importing it into the new calendar, but instead the import process created a third calendar that contained all the past appointments for the user (it was basically a copy of the user's original calendar).
This is NOT a "personal" calendar that resides in a PST file. The user does not have a PST file. The new calendar also appears in the OWA, which leads me to believe this is a server-side issue.
This problem also causes the user's Android phone not to receive calendar updates.
Ideally I would like to either remove the new default calendar and designate the old calendar the default, but I don't see an option to do that. Barring that, I would like to import all the old events from the original calendar into the new default calendar, and delete the original calendar.
A valid backup of the user's mailbox is available, but I would like the restore to be the option of last resort.
I am running Exchange 2010, clustered.
The user is running Outlook 2010.