Tag Archives: Office365

Failed to download file- “http://officecdn.microsoft.com/xxx/xxx.cab” from internet. Using proxyserver – 0. Error = 12029

This one caught me out recently. Scenario:

All http://officecdn.microsoft.com is whitelisted and available, definitely no issue there.

  • All other updates seem to come down fine.
  • There are no ADR rules at all in place.
  • Running a full sync produces the error below:

My client downloads updates through a proxy server and naturally the correct details for the proxy were in place on the Site System Settings under Site System Roles. Also the checkbox for Use a proxy server when synchronizing software updates was checked under the Proxy And Account Settings tab under the Software Update Point Properties role.

SOLUTION:

Despite the fact that ADRs were NOT created or used in any way, it transpired that the checkbox Use a proxy server when downloading content by using automatic deployment rules also had to be checked. Once this was selected, O365 updates started syncing.