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Refresh Disconnected Mailbox Screen in Exchange 2010 /2007
In exchange 2007 and exchange 2010, when a user is deleted the disconnected mailbox list is not refreshed, so if you need to reconnect a mailbox you cannot.
The quick way to refresh this is via powershell. Drop to a powershell prompt and enter the below, entering your mailbox database name
clean-mailboxdatabase <mailbox database name>
Job done.
Tags: powershell