I found this blog from the technet site. Just copied and pasted here in case the blog won’t be available for future use. Link to
Category: Exchange
Converting NDRs to x500
Issue: You ran a script to modify SMTP addresses on an Exchange 2010 user and accidentally overwrote all of their previous SMTP addresses including the
How to remove stuck mailbox move
When Remove-moverequest fails 1. Open ADSIEDIT and navigate to the OU where your broken user account is stored. (Under: Default Naming Context) 2. Locate the
Force removing Exchange 2010 database – ADSIEDIT.MSC
Run Get-Mailbox -Database “Database Name” –Arbitration command to find all the arbitration mailboxes If there are some arbitration mailboxes, move them to different databases and
Exchange SP1 – Previously install failed
If you ran an Exchange SP1 install and it failed, once you recovered from the setup /m:recoverserve switch (see my previous blog on how to
Exchange SP1 Upgrade – Warning
Be warned that when you try to upgrade Exchange 2010 to SP1, there is one pre-requisite that is not documented anywhere. The SP1 pre-checks doesn’t
Zero Day IT - Peter V Nguyen 
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