Well, I actually had already tried entering the UserName Password but AC would never authenticate the username/password and would always say it couldn't verify the username/password. So I never have been able to change that. I'll keep trying different usernames/passwords but without a Domain, it may just not work.
I may end up having to contact tech support which would only be the first time in 3 years.
I was just confused why you could do a manual backup but if the auto backup needed a username/password? Just a bit odd.
I never trust myself to do a manual backup routinely. I'm not in the office all day every day to remember that.