Thank you for the information.

I reviewed the outputs closely and see the fail-over event but can't find the user name who initiated it, unfortunately.

Thanks again!

I don't think I can do that but will check with the AD team on that.

Again, thank you for your suggestion and help.

I guess I read it wrong.  I'm not able to add the service account to "Perform Volume Maintenance Task" policy due to this:

"This setting is not compatible with computers running...

Yes, checked already but that only explains how to enable it at install time.  Unfortunately, we missed to check the option and installation has been completed without it.  This server...