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RDC Network Level Authentication in XP SP3

With all the articles around stating that Remote Desktop Connection (RDC) 6.1, as delivered with XP SP3, does indeed support NLA, you still have to turn on CredSSP manually for NLA to work! (which requires two manual registry changes and a reboot...)

Description of the Credential Security Service Provider (CredSSP) in Windows XP Service Pack 3

Update September 2018: Microsoft have removed KB article Q951608 which contained the instructions

Old link was

By on July 22, 2008 | Permalink | Comment

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February 10, 2009, tony says:

Good info! I had to search for a while until I found this. Even on MS I couldnt dig it out. Thanks! Good post!

February 19, 2009, Theo Gray says:

Thanks for dropping by tony; as with yourself it took me an age to get the answer for how to solve the problem.

Hopefully this article has helped a few other people find the RDC/NLA information more easily as well.

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