What do I do if the computer running Exchange Migrator stops responding during a migration? (NETIQKB10839)

goal

What do I do if the computer running Exchange Migrator stops responding during a migration?

fact
Exchange Migrator 1.x

fact
Exchange Migrator 2.x

fix

Since Exchange Migrator creates all the target mailboxes prior to migrating the mailbox data, all that is needed is to run the post migration task to update and synchronize migrated mailboxes.  Verify that all mailboxes in the current migration project were migrated.  If all the mailboxes specified in the current migration were not migrated, right-click the desired project and select the Retry Data Migration option.

Formerly known as NETIQKB10839