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Our organisation officially only supports Windows XP and IE6. I do like progress, so I installed Windows 7 anyway. Most of our internal applications work fine, but whenever I need to go through our proxy server (when the application is not hosted on our corporate network) I run into problems. The proxy uses integrated authentication using your domain credentials. And this doesn't work.

When I use Windows XP (even with IE8) it pops-up a dialog for my username and password and after that it just works. From Windows 7 I get the same dialog, but the sever won't accept my credentials (which are good and valid). My guess is that NTLM authentication changed between Windows XP and Windows 7 and does not work for the ISA server our corporate network uses (no idea which version). Big assumption on my part here: the authentication process uses NTLM. I'm not 100% sure of that, but I thought that was the standard way of doing that.

Does anyone know of a way to adjust settings on Windows 7 to make its NTLM more "Windows XP"-like?

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1 Answer 1

up vote 1 down vote accepted

Try changing these registry keys with regedit:

HKLM\System\CCS\Services\LanmanWorkstation\Parameters
    DWORD  DomainCompatibilityMode = 1
    DWORD  DNSNameResolutionRequired = 0

HKLM\System\CCS\Services\Netlogon\Parameters
    DWORD  RequireSignOrSeal = 0
    DWORD  RequireStrongKey = 0
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1  
In the Netlogon parameters, there was a "RequireSignOrSeal", is that what you meant? –  Jeroen-bart Engelen Jun 21 '10 at 14:38
    
It worked like a charm (and it's RequireSignOrSeal allright). Thanks! –  Jeroen-bart Engelen Jun 21 '10 at 14:45
    
Yeah, typo, it should be "RequireSignOrSeal" –  Chris S Jun 21 '10 at 14:53

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