~ Subbulakshmi Kumar | Support Engineer
I was recently working with a customer who found that he was unable to download third party updates from System Center 2012 Configuration Manager (ConfigMgr 2012) when the WSUS content was on a DFS share. The 3rd party updates could be successfully published to it via System Center Update Publisher (SCUP) but when he tried to download them it would fail.
He also found the following errors in patchdownloader.log:
HttpSendRequest failed HTTP_STATUS_NOT_FOUND Software Updates Patch Downloader
ERROR: DownloadContentFiles() failed with hr=0x80070194 Software Updates Patch Downloader
The reason this was happening was because the download was using the Network Service account for authentication, and the Network Service account does not have permissions to the DFS share (which is by design).
If you happen to come across the same problem, to work around this simply change the access authentication to a specific user (or group) on the DFS share in the content virtual directory of the WSUS site in IIS, then give permissions to that user (or group) on the DFS share. This allows the download to complete successfully.
Hope this helps!
Subbulakshmi Kumar | Support Engineer | Microsoft GBS Management and Security Division
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