In Exchange 2007 you can’t remove disconnected mailboxes from the GUI you can do this from the powershell. Show the disconnected mailboxes on the server. Get-MailboxStatistics | where-object { $_.DisconnectDate -ne $null } | Select DisplayName,MailboxGuid Remove one disconnected mailbox. Remove-Mailbox -Database -StoreMailboxIdentity -confirm:$false To remove all mailboxes at ones we have to set a…