Hi Daniel,
I have my Android phone email set up like that at the moment. What concerns me is does that change now I log in on the website using a passkey? Currently everything still works, but if I ever need to set the phone mail account up again does the same old password still work? I don't intend to try that now, I want to know how it's expected to work. I only discovered this this morning and knowing a passkey was a good security idea went through with the process without checking. Is this change documented on the website somewhere?
My other problem is using the other email addresses set up on our account as webmail on PCs or tablets. My wife's VM email, for example. Is she going to have to jump through these hoops if ever she needs to log back in or changes her phone. She only has one email account, so can't give another to verify her ID.