Hello,
Yes - I did try that but it made no difference. I also tried using "Use SPN" but that hangs for 15 minutes trying to add it and eventually gives me an error (I don't have the exact error handy at the moment, but I think it was something like "unable to use principal name"). I followed the instructions per VMware KB article to setup the SPN ahead of time:
setspn -S STS/mydomainname.com AccountName
And it gave me a successful result after running the command - so I am pretty sure I did that correctly.
NK