We have recently migrated an exchange 2003 network to exchange 2010. Our process took a few weeks and essentially we followed steps similar to this article:
This network has perhaps 80 users; 20 users have access to about 30 other user's calendars, their permissions are set as owners -all users use OL2003
What we are experiencing are problems with users consistently accessing these share calendars. If staff have been in calendars & go to another program & back, they will get an error stating they do not have sufficient permission to open the calendar folder, or operation failed. They can also get this error if they have opened too many calendars or received an error on attempting anyone of them. Although I can’t find a common denominator for this problem, one work around is have them close and open outlook. They will then regain access to the calendar they were just blocked from before, though they may now be blocked from another’s they just had access to before they closed and opened Outlook.
This has been the work around for end users. Can’t open a calendar? Then close and open outlook and try again. Needless to say it’s crazy making for my end users and has me feeling the pressure.
Any help would be appreciated.
PS I have tried this tip:
Set-RpcClientAccess –Server Exchange_server_name –EncryptionRequired $True
but my server was already set to False.