I’m having an interesting problem with Exchange 2010 calendar permissions. Some user’s explicit permissions to shared calendars are being reset to the default Free/Busy time permission. So Far this seems pretty random.
I have many users who have given multiple people different levels of access to their calendars, Reviewer for some, Publishing Editor to others, etc…
In some cases the permission for all the people who were given explicit permission to the calendar have had their permission level reset to the default Free/busy time. Each person who was given permission is still individually listed in the user’s calendar permissions but their access level has just been set to Free/Busy time.
In other cases where a user has granted multiple people access to their calendar, only a few users have had their permission changed to Free/Busy time while the rest still have the permission which they were originally given.
And for most users, the permissions on their calendars have not changed at all.
The permissions have been set over time multiple ways, some through calendar sharing requests, some by setting them in manually on the permissions tab of the calendar properties, and some have been set through EMS with the Add-MailboxFolderPermissions command.
So far I haven’t seen any pattern in who is affected, both on the user side and the people whose permission is affected, or how the permissions were set. I’m wondering if anyone has any insight into why some explicit permissions are getting reset to default Free/Busy time or if I just need to keep fixing the changed permissions individually until I can establish some sort of pattern.
