Permissions Analyzer Unable to connect to Domain

Hello all, new to Solar Winds and this community. I was researching posts regarding issues connecting to the domain controller. 

I have tested with multiple IP's, and various configurations for the domain name. I have tested access to three different domain controllers successfully, however the tool cannot connect using the same credentials. I have tried service accounts and Domain admin accounts. I keep getting an error message "Unable to connect to the domain, the server is not ooperational." 

I noticed the previous posts were a bit aged, is this tool not compatible with server 2016 perhaps? I am running the tool on my workstation (Win10Pro-64) perhaps there is a compatibility issue. 

Thanks for any insights, information or assistance you can provide.