Windows Server 2016 Core
- WSUS configured for SSL
After the installation of August.2019 Microsoft Security updates. I found my clients would no longer check in. At first i thought this might be because of a SSL problem as i run WSUS over 8531. I even attempted restoring to a previous backup to no avail so into the logs we go.
I pulled up the c:\windows\windowsupdate.log and began to scour the logs for any clues.
Logon Login failed for user ‘NT AUTHORITY\NETWORK SERVICE’. Reason: Server is in script upgrade mode. Only administrator can connect at this time.
I can’t say for sure what the root cause of the problem. But what i did find was others with similiar errors. Running the command below seems to work, your mileage may vary. If i had more time i would love to know what actually broke it but for now this will do.
“C:\Program Files\Update Services\Tools\wsusutil.exe” postinstall