I am trying to add one of my co-workers to the internal testing group for TestFlight. The problem is that her Apple ID is different from her email address. A few years ago she was able to change her email and now it differs from her Apple ID.
She was able to accept the App Store Connect invite when I sent it to the proper email address, but when that happened, it changed her 'Email' to the Apple ID, which isn't correct.
Now when the TestFlight email is sent, it's sending to that Apple ID instead of the actual email address associated with the Apple ID.
How can I get around this or fix this? Seems like an oversight or bad assumption that your Apple ID MUST be the same as your email address.