When performing Software Update Point synchronization on the child primary site, the following error was logged in the wsyncmgr.log file:
Sync failed: WSUS server not configured. Source: CWSyncMgr::DoSync
In my case, affected primary site was child-site of the central primary site which is configured to perform synchronization with the Microsoft Update.
First thing I have stumbled upon was the following TechNet article: Troubleshooting Software Updates Synchronization Failures – http://technet.microsoft.com/en-us/library/bb735874.aspx which also contains possible solutions for the exact problem I was experiencing. However, none of the suggested solutions worked for me.
After spending some time troubleshooting, it turned out that there was a problem with the synchronization between the central (parent) and the affected primary (child) site. In order to fix the problem, I had to make sure that:
1. Standard Sender Address is configured appropriately on both sites and that
2. Public keys between the sites are manually exchanged (How to Manually Exchange Public Keys Between Sites – http://technet.microsoft.com/en-us/library/bb693690.aspx)
Once synchronization between sites was successfully established, error in the wsyncmgr.log file was gone and Software Update Point synchronization works as expected.