IIS disable automatically in Orion 2020.2

My first suspicion is that something else is disabling that service. Possibly a configuration management task or a group policy preference?

Your best bet is with Solarwinds Support.

1.  Capture screen shots of the problem.

2. Start collecting Diagnostics from all your pollers.

3.  While that's happening, open a ticket online with Support.

4. Once the online ticket is created, attach your screen shots and diagnostics.

5. When they've finished uploading, call Support, reference the Support Ticket number that automatically was e-mailed to you, and get someone on it asap.  

They'll figure it out and get it fixed quickly.  I've never had a failed experience with Solarwinds Technical Support (although some cases are resolved more quickly than other).

I did. They also tried a lot and IIS was rebuild based on their suggestion. As that also haven't worked they asked me to reinstall.

Any way we can identify what is causing it to disable.

How about checking Event viewer -> System log -> Source: "Service Control Manager" ? Just tried myself to disable a service and it gets logged:

Yes, I am getting the same event in System log and also the Event ID 7036 which tells Service is in stopped state. But not seeing anything which tells why it is disabled. Only thing I can see is soon after these events I can see the event stating Group policy is applied successfully. So suspecting this issue is due to GP. Checking with my sever team for the same.

Yes, it was group policy issue.

Is TLS Version 1.2 disabled?