ATT allows its users to associate their email with other services such as email, internet, and U-Verse. If you have shared your account and wish to troubleshoot this issue you can then follow the given steps:
• The first thing to ensure is that your access ID and email share the same password
• If the passwords are same, you would need to change or reset the password as this would make sure that your ID at Att.com and Att.net is also changed.
Above are the steps needed to troubleshoot for shared ATT passwords. If you face any such errors or even want more assistance regarding the same error, you can promptly connect with the ATT Technical Support number to avail expert advice