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Find an email alias in Active Directory

Posted: Wednesday, June 4th, 2008 by marcus

Ever try to add a new SMTP alias to a user account, only to be told that the alias was already in use? Finding where this alias is already in use becomes really easy by performing a custom search inside of Active Directory.

From AD Users & Computers, right click on your domain and choose Find.
From the Find: drop-down list, select Custom Search
Click on the Advanced tab
Enter the following LDAP query:


Remember to change alias@domain.com to the email address that you are attempting to find.

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