You can fix this by making some changes to the NTUserFolder source: 1. Change the first parameter from None to the name of a DC, in the calls to NetUserEnum and NetUserGetInfo 2. Change the second parameter from "." to the name of a DC, in the call to LogonUser That looks like it should work, but it is untested. A question for anyone else using NTUserFolder.... Would it be appropriate to change the default to authenticate in the domain?