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 Credentials.
Under profile, select “Custom” and enter your current credentials, and save over the existing profile or save it with a new name. Select the profile you just saved. Try logging on to a system,
In Remote Desktop Connection Manager, save your RDG session. You may have still get the error ONCE after doing this, click through it, log on and save your RDG session AGAIN.
This ordinal error pops up every time I change credentials and have to do this.