After migrating from Exchange 2010 to Exchange 2013 we are experiencing random issues accessing Public Folders. Issues range from a hung server requests to on-screen errors like this one:
“Cannot expand the folder. Microsoft Exchange is not available. Either there are network problems or the Exchange server is down for maintenance”
We are using groups to manage permissions, verified that they are mail enabled, and have used the following PS command to re-propagate permissions:
./AddUsersToPFRecursive.ps1 -TopPublicFolder "%folder%" -User "%groupname" -Permissions %permissionlevel"
The odd thing is that if the user bounces between on of their Inbox folders then back to one of the Public folders or restarts Outlook it seems to resolve itself.
Ideas?