On 24 Aug 2018, "HB" wrote in
alt.comp.os.windows-10:

They must have some new security thing. If you try and get your
mail from more than one device you can't. You have to go to Google
and change the password on each one, to the new password.

Unless something has changed in the past month or so, that's not
accurate. I've added Gmail accounts to mail programs on two new Android
devices, and Google sent me an email both times asking me to confirm
that it was my device. After that I had full access to Gmail. I did not
have to change any passwords.