WinXP SP1 -> SP2 breaks NTLM authentication.

[Guest]

Hello.

We run a BlueCoat proxy and have confirmed via network packet captures that
when accessing web content with Win XP SP2 installed from applications such
as Microsoft Office, the NTLM authentication dialog box appears.

To confirm this we took a system with SP1 and with Microsoft Outlook opened
emails with web content. Under these tests, NTLM authentication was being
passed and is proven by watching the network packet capture. There are no
problems with this configuration.


When the same system was upgraded to SP2, performing the same function
failed. Instead it prompted for credentials in Outlook when trying to view
the email. Viewing the packet capture, the Proxy was passed null values
although the user is authenticated.

Does anyone have a recommended solution? I have reported this to Microsoft,
but since it is technical, they want to charge me for the support. I do not
see the logic in being charged to solve a problem that is a result of their
software update. The packet captures and the test conditions provide enough
proof that SP2 has broken the passing of NTLM credentials in 3rd party
applications including Microsoft Office.

Any help or suggestions would be greatly appreciated.

 

[ndog69]

We have run into the same situation. I have (also) verified through
packet sniffing and testing upgrade paths that the problem is with XP
SP 2. Does anyone have an answer for this yet? Bluecoat surely does
not.

 

[Yves Leclerc]

This is an orphaned reply. Please, always reply to the original post.

 

[Torgeir Bakken \(MVP\)]

This is an orphaned reply. Please, always reply to the original post.

Hi

No, it is not orphaned. If you look at the header of ndog69's post, you
can see the reference id to the original post:

References: <[email protected]>


And the Mozilla newsreader have no problem showing that ndog69's post
is a reply to the original post by RH (dated 8 Jan 2005 16:31:06 -0800)