TMG 2010 and Smoothwall - TMG won't update definitions
I'm trying to get my TMG 2010 server to update its definitions (for NIS) through our Smoothwall proxy.
I've set a web chaining rule to point the TMG at the Smootwall for Microsoft Update sites and set the Smoothwall server to allow unauthenticated access to all of the MS update sites.
When I try and update the NIS definitions on the TMG, I can see entries in the Smoothwall log allowing access to the following sites:
But on the TMG server I always get the error:
An error occurred during an attempt to check for, download, or install definition updates on the server SERVER.
The failure is due to error: 0x80244021
The web chaining is obviously working but I can't find what that error code means anywhere?