Last night, we updated all our windows servers except these two DMZ servers. before we doing the windows update, I put all the servers into Maintenance Mode except DMZs.

Windows Servers were rebooted for several times to finish the update, these included the SCOM RMS server.

After the update, I switch them back to normal mode, but then found DMZs were in Unmonitored Mode. I checked the Event logs on DMZs,

Resuming monitoring for instance "Local Area Connection" with id:"{E36DDDA5-E834-7776-4793-BBE819F11ADD}" as the instance maintenance mode is OFF. Management group "Domain"

Something like that.

Checked the certificates on DMZs, looks normal. Personal and Public Certs are all there.

Anyone can give me some ideas?

Thanks,

Peter