Microsoft Exchange and SQL
title: Microsoft Exchange - Error -3407 (unknown) during Mailbox backup created_at: 2012.02.13 updated_at: 2012.02.13 category: Microsoft Exchange and SQL platforms: Windows ---
Removing that mailbox from the script is typically the simplest approach to resolving this error.
If this is still an active mailbox, then Retrospect may have having trouble accessing it. Try removing the mailbox from Retrospect and adding it again.
Last Update: 13 février 2012