SYMPTOM

 

When you run the Windows 7 Upgrade Advisor tool on a system which use a proxy to access the Internet you receive the error:

 

“Windows 7 Upgrade Advisor was unable to reach the Microsoft server for compatibility information.  Check your internet connection and try again later.”

 

In the error log (%temp%\WuaDiagnostics.log) you can see the update advisor tries to access:

http://aeos.microsoft.com/compatibilityexchange/compatibilityexchange.svc and then receives the error like following:

[7/23/2010 12:04:41 PM] Exception: The request failed with HTTP status 407: Proxy Authentication Required

 

ROOT CAUSE

 

The Windows 7 Upgrade Advisor does not support proxy authentication.

 

RESOLUTION

 

On the proxy server, creating an anonymous access rule specific to the destinations FQDN's used by the Windows 7 Upgrade Advisor. For example, you may create the following rules:

 

Action: Allow

Protocols: HTTP, HTTPS

From/Listener: Internal

To: Domain Name Set

aeos.microsoft.com

aestats.microsoft.com

crl.microsoft.com

download.microsoft.com

go.microsoft.com

 

Condition: All Users

 

REFERENCES

http://social.technet.microsoft.com/Forums/en-US/w7itprohardware/thread/d229910f-2360-470d-b0f9-9e67e17ae67e

http://social.technet.microsoft.com/Forums/en-US/w7itprogeneral/thread/f964885e-8ae2-4ea9-b7c3-5411acd12ccd

http://social.answers.microsoft.com/Forums/en-IN/w7install/thread/a1c57313-0297-4dc4-8b51-80eb865a7150

http://social.answers.microsoft.com/Forums/en-US/w7install/thread/7b59233d-9a16-4362-a917-34ee901c232b

http://social.answers.microsoft.com/Forums/en-US/w7install/thread/49248ce5-e979-44ac-92dd-4d48a0f20ca2

http://social.answers.microsoft.com/Forums/en-US/vistainstall/thread/304016ee-8063-4d80-9c27-7fd7b3f91d5d

http://social.answers.microsoft.com/Forums/en/w7install/thread/5522421e-b7f7-4508-b785-90aeb76dd864

http://social.answers.microsoft.com/Forums/en-US/w7install/thread/7fe5f808-b324-4d27-ace4-3aeedd4ecd91