Hello
Thank you for your question and reaching out. I can understand you are having issues related to ADFS service unavailable.
Run the below command and see if the endpoint is listed. If not, reboot the server and check again.
netsh http sh serv | findstr /i /c:"trust/13/usernamemixed"
When you do you should see something like below if the endpoint is available.
C:\Windows\system32>netsh http sh serv | findstr /i /c:"trust/13/usernamemixed"
HTTPS://+:443/ADFS/SERVICES/TRUST/13/USERNAMEMIXED/
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