June 5, 2012

Find existing SMTP address in Exchange

Have you ever tried adding an smtp address in exchange only to find that another account already has it listed as an SMTP address?

Well you can find which accounts have duplicate smtp addresses by the following LDAP query in ADUC

1: Open Active Directory Users and Computers
2: In the Find list, select Custom Search.
3: In the Domain list drop-down, select entire directory
4: Click on the Advanced tab and enter: 

proxyaddresses=smtp:john.smith@domain.com 

5: Click on Find now button and it will bring the object that contains that particular SMTP address.

NB: This works for all versions of Exchange (even Exchange 2010)

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