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Duplicate 'name' attribute in Active Directory

Posted on 2009-07-08
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Last Modified: 2012-05-07
We have run into an issue where multiple names (e.g., John Smith) appear in the same Organizational Unit in Active Directory.  While other attributes like samaccountname, employeeid and others are unique, we find that Active Directory will not allow for a duplicate 'name' attribute.  Is this because CN derives by name by default?  Or, is there a workaround?

We ponder appending some unique value to the end of name (e.g., John Smith [jsmith01]).  However, I wanted to throw this question out there to see what other feedback I can get.  From what I have read, it seems like while you cannot have duplicate 'name' attribute values in the same Organizational Unit, you can have the same name in Active Directory in another OU.  Mainly, I was just wondering what others have done because I suspect it must be common for large directories with many users in OUs to have similar run ins with multiple John Smith names (or other common names).
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Question by:CecilAdmin
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Chris Dent earned 500 total points
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>  Is this because CN derives by name by default?

Yes. Every CN must be unique within the same container to meet the constraint that every Distinguished Name (DN) must be unique.

I'm afraid there's no way around that aside from changing the value for CN (also known as the Relative DN, RDN).

This is a limitation of LDAP rather than something unique to AD.

Whenever I've bumped into this in the past either the givenName is changed to a short version, if applicable. Or a middle initial is inserted, again if applicable.

Chris
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