Article ID: 2448270 - View products that this article applies to.
When you run the Windows 7 Upgrade Advisor tool on a system that must use a proxy in order 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.”
Windows 7 Upgrade Advisor tries to reach the Microsoft server to get the compatibility information. The error is shown since Windows 7 Upgrade Advisor does not support proxy authentication.
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
On the proxy, create 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:
Protocols: HTTP, HTTPS
To: Domain Name Set
Condition: All Users
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.