Hi all..
I just faced the same issue of "Use Windows Credentials"..
But, I found something weird too...
In my case, my VCenter Amin group contains two users, one of them is the default domain admin user and another created user.
When I tried to log with the default domain admin user with using "Using Windows Credentials" tickbox, It gave me the following error:
"Client is not authenticated to VMware Inventory Service..."
When I tried to log with the other user who isn't a domain admin using the same way, it logged in successfully with no issues..
I don't know the exact conflict or where it is..but this what happened with me...
Waiting for further comments..