Update User ID alert
I have received an undated alert from AT&T via my AT&T account asking me to update my User ID to one that is an e-mail address. And I'm being told that it's best to use an e-mail address that is not my AT&T e-mail address. While I understand that this is for security reasons, this approach is very counterintuitive and confusing. There is a lack of explanation around the whole process.
To be more specific, I'll use a stand-in ID for my specific case. I have an ameritech.net e-mail address, namely, [email scrubbed]. Apparently, my AT&T User ID is notreal, although I normally wouldn't know that because I never need to use it. To access my Yahoo mail account, I use [email scrubbed] as my ID. To access my account at att.com, I log in as [email scrubbed]. Now I am being advised to change my User ID notreal to an e-mail address that is not [email scrubbed].
What will be the practical impact of such a change? Say I use [email scrubbed] as my new User ID. To get my [email scrubbed] e-mail, will I have to sign in as email@example.com? Where is AT&T going to send e-mail messages that affect my [email scrubbed] e-mail account? To firstname.lastname@example.org?
Perhaps I am misunderstanding something, because that seems kind of loony. I would appreciate if someone can explain how or when the non-AT&T User ID e-mail address will be used. I would also be interested in knowing why AT&T is asking for this when no other company at which I have an account has set up their login security this way.