This message pops up when trying to connect to a newly created, or exisiting (migrated from 2007) mailbox in Microsoft Exchange Server 2010. Keep in mind this is a mixed mode (Exchange 2003, 2007, and 2010) Server configuration. Database is mounted. I can connect to 2003 and 2007 mailboxes. I have no clue what the problem is. Please help.
Thanks in advance