AD LDS able to accept wholeSubtree queries to RootDSE?

Hello All,

I have multiple outlook clients which are already configured to do contact lookup to a special Unix box via LDAP.
The LDAP query configured on these clients does not specify any base DN, and is querying directly to the RootDSE for contacts, which this special box is somehow able to respond.

But when I do this query to a AD LDS instance, it gives me a Result <32>, problem 2001 error. 

Is there a way to configure AD LDS to accept wholeSubtree queries without specifying the baseDN?

Thanks!