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How to query a secondary domain controller using LDAP?

Last Modified: 2008-05-31
I'm working on a project where I am programmatically checking all the users for a given domain (and there are several domains). For example, I'll use a LDAP query like this:
"LDAP://DC=CA,DC=microsoft,DC=com" with a .Filter = ("(objectClass=user)"). Everything is fine.

CA is mapped to go to CA-server1. All users are returned poperly.

Apparently at 2 remote locations, the primary domain controller does not have the pwdLastSet and useraccountcontrol fields setup properly on CA-server1 (for whatever reason, outside of my control). At each location, there is a secondary domain controller (which I'll reference as CA-server2)., which does have the correct values for each user; but I am unable to figure out how to query the second domain controller successfully for users. for example:
"LDAP://CN=CA-server2,OU=Domain Controllers,DC=CA,DC=microsoft,DC=com" this query will run, but does not return users.

Is there a way to still query DC=CA, but pull the users from a different server rather than the default server
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Senior Network Consultant / Engineer
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I tried your suggestion. After attempting to run the query for about 30 seconds, I get: The server is not operational.

I am positive the server.domain.com is correct, because I ping the server using the same path.


Hail LDAP god, you were correct. My query was slightly off. With CA-server2.CA.microsoft.com, I'm getting results back.

Jeremy WeisingerSenior Network Consultant / Engineer

Glad to help. =)

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