Find out why you may get an error when attempting to register a User ID/Access ID.
If you’re trying to register and get a message that your user ID is already in use, either another customer has already selected that user ID or you’ve already registered with it.
If you remember your password, you can try to sign in to myAT&T for Business with that User ID/Access ID.
If you have forgotten your password, select Forgot User ID/Password? on the Sign-in page.
If these suggestions don’t help, someone else has probably registered with that user ID and you’ll have to select a different user ID to register.
If you continue to have difficulties, contact us and describe the situation. Be sure to include as much information as possible: your billing telephone number, your User ID, your current email address, and any previous email addresses.