Proxycfg.exe

I originally came across Proxycfg.exe after installing one of the Exchange 2007 Update Rollup packs. Some of the Exchange 2007 services would not start up, in particular the Microsoft Exchange Service Host service.

I have now came across the exact same issue with Microsoft SQL Server 2005 and the SQL Server Integration Services service also.

This problem occurs because the server cannot reach the following Microsoft Web site: http://crl.microsoft.com/pki/crl/products/CSPCA.crl .For some reason these services do not know how to access the Internet if the server is configured to use a Proxy server.
There are various solutions for each individual service that cannot start that involve installing (many) updates to stop these services attempting to reach this site. Alternatively the easiest way to solve this is configure the server services to use the logged on users proxy configuration. To do this open a CMD prompt and change the directory to C:\Windows\System32 and run the command proxycfg.exe -u. In my case the services affected by this problem then all started immediately.