I think I reported this bug about a year ago, but we still have the issue.
A new Scout’s mom created a my.scouting account to be able to register her daughter in our Troop. The Scout was registered and her Scoutbook account was created. I added her Mom and Dad to her Scoutbook account. I then hit invite to both her mom and dad. Her mom got the invite email, showing her email and the auto generated first password. That didn’t work. We tried it 3 more times until I remembered that she should use her my.scouting login and password. When she did, it all worked fine.
So, the interface is not correct when someone has a my.scouting account. It should NOT have the invite link. OR, if it does, it should send an email that says “connect to your Scout using your my.scouting” account.
This was all pretty frustrating.