So, I was able to get this resolved. This is from memory so hopefully I am getting this right. I solved this by going to the root of the Remote Desktop Conenction manager, in the left pane, right click on your server group, properties, Logon Credenti...

Our error is 379 for the ordinal. Windows Server 2012 rds host protected by DUO using an RDG file to jump to other servers (Very common for AWS.) We get this error when opening Remote Desktop Connection Manager via the RDG file. We do NOT get the err...