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How to remove the Vista RDP Prompt

October 4, 2007

You know what I’m talking about. That pesky authentication check when you RDP to a pre-Vista machine. Sick of that? Well, so am I. And luckily, one of my fellow engineers discovered this. Here’s the fix!

You know, this one:

The registry key is a DWORD value at \\HKCU\Software\Microsoft\Terminal Server Client\AuthenticationLevelOverride

http://support.microsoft.com/kb/895433 

Here are the 3 possible values, at least in Windows Server 2003:

Set the authentication level value to one of the following values:

•    0 This value corresponds to “No authentication.”
•    1 This value corresponds to “Require authentication.”
•    2 This value corresponds to “Attempt authentication.”

I experimented and found that 2 is the default now.  I tested the 3 modes and found that:

0 -> Doesn’t prompt. 
1 -> Gives a similar message but doesn’t allow me to continue.  This is the strictest.
2 -> Gives the message but allows me to accept and continue.

In my case, I don’t even want the prompt so I set AuthenticationLevelOverride to 0 and I’m able to log into my Remote Desktop sessions without that extra prompt.

Warning: this is a decrease in security so should only be changed if you are aware of the what and why of this change.

OR

You could use Visionapp’s vRD or RoyalTS – two amazing RDP managers. Then you don’t have to worry about all that stuff either. Just store your credentials and go!

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2 comments

  1. Hai…..

    i have seen your site… Its very useful to know about how to remove vista RDP prompt…..


  2. for me, it only worked by doing the same as described in the article, but on HKLM level. HKCU didn’t work.



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