Johnny Yao WorkSpace

  reference: How to remove disconnected mailboxes in Exchange Server 2010     Get-MailboxStatistics -Database "Mailbox Database 0842341759" Get-MailboxStatistics -Database "Mailbox Database 0842341759"  | ft displayname,disconnectdate,mailboxguid Remove-Mailbox -Database "E14 Mailbox DB Name" -StoreMailboxIdentity "MailboxGuid" -Confirm:$False Run get-MailboxDatabase | clean-mailboxdatabase     Finally, I found the lost mailbox on corp dmain.

        [PS] Get-OwaVirtualDirectory  -Identity "bqt-ca07\owa (Default Web Site)" | fl externalurl ExternalUrl : https://oaw.msft.com