Autodiscover seems to have a lot of similar issues, but this one case existing solutions don't seem to help...
Has the common "Allow this website to configure server settings?". However, the server listed below is a server that was removed years ago. The alert is popping up suddenly on a computer (which has been in service for over a year now without having popped this before) that wasn't even around when that server was in production...
There are no autodiscover settings in DNS for that old server. I've verified that they only point to the correct new server. I've done registry "find" on the incorrect server name and also have come up empty.
This is just he latest occurrence of this, it's not a one-off event. It's not been one specific user or PC over the years. Previously I wrote it off as something cached locally as the computers were old enough as they may have been around when the old server was in production. However, now I have one where that definitely is not the case.