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Rollback Massive Updates to Email Address in Active Directory / Exchange

Posted on 2012-04-10
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Last Modified: 2012-04-14
We recently were using a tool to import e-mail address into active directory and accidentally completely wiped out all of the e-mail addresses that were associated with our Exchange users.  Any user who had "Automatically update email addresses based on e-mail address policy" checked seem to be unaffected but anyone who did not have it checked suddenly have no e-mail addresses anymore.  

We do have backups of Exchange and AD and the "recycle bin" features of AD are enabled although I don't think they will help as the objects were not deleted.

How can we go back an restore all of the e-mail addresses associated with each user?
And no, we will not be using the AD import tool again. . .

Environment:
Server 2008 R2
Exchange 2010 SP2 (14.2.247.5)
Active Directory Recycle Bin is enabled
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Question by:jasonrac
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X-treem earned 500 total points
ID: 37827741
you can restore the AD to a temp DC that is not on the network, script the retrieval of all SMTP addresses from users that are not updated automatically and then script in your production to addd them again
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by:jasonrac
ID: 37828101
Thank you, that sounds like a great plan - can you offer any insight into how we can script the SMTP in and out?
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by:X-treem
ID: 37828127
use vbscript and ADSI, I don't have an example script at hand as I'm at work, but there are plenty examples on the internet
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