Having a lot of issues recently with the EMC showing the wrong information. Specifially showing databases as not mounted or in unknown replication status. Also mailboxes that are removed are not showing in disconnected mailboxes inside the EMC. However if you use powershell commands you get correct information. It's like EMC has become disconnected from reality for some reason. Currently our 4 DB show inside EMC as being "unknown" for mounted and in poor replication, however looking at the results inside PS shows the correct information which is exactly opposite of it. Running the PS cmdlet: Get-MailboxDatabase -Status | select Name, server, storagegroup, mounted | fl * shows all the DB mounted and happy.
Has anyone else encountered this issue?