If you are patching your SCCM Server or WSUS Server, please take note on KB3159706. The SCCM SUP will failed on software update sync and you’ll see error “Remote configuration failed on WSUS server” in the WCM.log.
You can either uninstall the patch or follow the guide https://support.microsoft.com/en-us/kb/3159706 to complete the postinstall.
- Run command prompt with administrative rights
- Enter "C:\Program Files\Update Services\Tools\wsusutil.exe" postinstall /servicing
- Restart the WSUS Service
- Restart the SMS_EXECUTIVE Service
If SSL is enabled on the WSUS server, follow the guide in https://support.microsoft.com/en-us/kb/3159706