Hi @James Piere ,
According to my research, sbcglobal.net is part of the AT&T family which according to the AT&T website uses att.net mail servers which in turn means that means that you need to use an AT&T <Secure email key>as the email account password when adding the account in Outlook.
Follow the steps in the articles and then copy the generated key and enter it in your Outlook:
https://www.att.com/support/article/email-support/KM1086159
https://www.att.com/support/article/email-support/KM1240308/?
(Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)
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