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Following are the instructions to activate your AT&T BIM account:

1. Access the AT&T Business Messaging Services website.
2. Click on "Account Center" tab at the top of the page.
3. Click in the box labeled "If you do not have an email address, check here", and click "Submit".
4. Enter the Account (DSLAAA), the Network Access ID (ATTnnnnn), and Password, and click "Submit".
5. Your password is in an "expired" status initially, and you will be forced to change it. Note: Click on the link for "Password Guidelines" for an explanation of a valid password.
6. If you wish to use the system assigned userid as your e-mail address you can proceed to Configure your Email Client. To customize your e-mail address For example: "jsmith@attglobal.net", complete steps 7 through 9.
7. Click on "Manage E-mail".
8. Click on "Change E-mail".
9. Change the e-mail ID portion your e-mail address to what you would like as an alias. Note: This must be unique. If you request an alias that is already being used, it will incremented numerically. For example: jsmith1@attglobal.net.