Everything was working fine for about 9 months, now it syncs successfully, but will no longer download the updates. So the clients all show no updates available. I have already run the reset and blew the WSUSContent folder away. Below is the error in the event log.
Event ID 364
Content file download failed.
Reason: The operation being requested was not performed because the user has not logged on to the network. The specified service does not exist. (Exception from HRESULT: 0x800704DD)
Source File: /d/msdownload/update/software/defu/2016/06/am_engine_c27a4fbbbf4950359fd2f16e3be5e3714aa1ad5b.exe
Destination File: D:\WSUS\WsusContent\5B\C27A4FBBBF4950359FD2F16E3BE5E3714AA1AD5B.exe