We have a user that was running entourage 2004 on a Mac. We started getting errors with his shared calendar when other users tried accessing them. The error states: "Could not read the calendar. You do not have sufficient permission to perform this operation on this object. See the folder contact or your system administrator"
What we tried first to fix it (and worked the first time, not the second.)
-Removed all shared permissions from the owner's calendar/mailbox.
-Backed up the mailbox using Exmerge
-In A.D., deleted the mailbox, removed all Exchange attributes from his account.
-In the Exchange system manager, Ran the cleanup agent.
-Purged the user's mailbox, waited around 30 minutes for replication.
-Re-create the mailbox in exchange
-Re added the share permissions to the mailbox, re add the shared calendar to users who were using them
-Used Exmerge to re-import the mail back into the user's new mailbox.
-created a brand new profile for the user on his laptop in outlook.
After doing this, one person was fixed, but another was not and is still getting the error messages. She also will get a problem with the shared calendar view where it will start flipping by month and will not stop until ending outlook through task manager.