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Getting Event ID 9217 on Exchange 2010 CAS server - duplicate smtp

Posted on 2012-03-27
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Last Modified: 2012-04-02
Every now and then my Exchange 2010 CAS server throws up and event 9217. A message is being deferred because two objects in AD have the same SMTP address. I am guessing this was done programatically by ILM. Its only one user. The email address it gives in the log is something like jdoe@domain.com. I go to the account of J doe and I see the address but how do I find out what other object has this SMTP address. It could be anywhere. A user, a contact or even a public folder although a PF is unlikely. Its like a needle in a haystack. Can I use powershell to find it? That would be the easiest for me. I don't like messing with LDP.
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Question by:osiexchange
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Expert Comment

by:dreamraghu
ID: 37774965
The issue is because of the Duplicate LegacyExchange DN.

Check for the Legacy Exchange DN Values using LDP an dif you find any two same legacyexchangeDN value, you have to change that value and you will not get this event id again.
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by:osiexchange
ID: 37776398
I understand that but how do I do that. I am not that proficient at PowerShell or LDP. Would be helpful if someone could post the proper command to search and find this duplicate legacyexchangeDN.
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Accepted Solution

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osiexchange earned 0 total points
ID: 37776906
I found the answer in this well written article.

http://www.msexchange.org/articles/finding-duplicate-smtp-addresses.html
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Author Closing Comment

by:osiexchange
ID: 37795094
I found the answer myself
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