Hi
I have coexistence with Exchange 2007 and Exchange 2013. I've moved a mailbox to Exchange 2013 and now cannot view the public folders on Exchange 2007. The error message I get is "could not connect to the public folder server. microsoft exchange is not available. either there are network problems or the exchange server is down for maintenance."
Mailboxes on Exchange 2007 do not have any problems viewing public folders. I can't migrate users to Exchange 2013 until this issue is resolved.
The IIS permissions to the Public virtual directory on Exchange 2007 is set to Intergrated Windows and Basic authentication.