Wednesday, March 2, 2005

Quick way to find hidden mailboxes on Exchange

All the hidden Exchange mailboxes are easily identified by the attribute msExchHideFromAddressLists which is set to a value of TRUE. All we have to do is perform a custom LDAP query against our AD to search for users with the above attribute set accordingly. This can easily be done with Active Directory Users & Computers:

1. Bring up Active Directory Users & Computers.
2. Right-click your domain name at the top, and choose Find.
3. In the Find combo box at the top, select Custom Search.
4. Click the Advanced tab.
5. Paste in the following LDAP query and then click Find Now.


The list of hidden mailboxes will then be displayed. Don't forget that this will include System Mailboxes. Be sure to leave those alone!

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