SMTPUseOAuth
Use this to specify whether to use OAuth2 to connect to the primary SMTP server for outbound email.
To use OAuth 2.0 to connect to the primary SMTP server, set this parameter to Y. Set it to N if you do not want to use OAuth2.
To use OAuth2 for outbound email, you must complete the tasks to register the OAuth2 application through Microsoft Azure and configure the service operation in PeopleSoft Pure Internet Architecture (PIA).
See MultiChannel Framework: Setting Up MCF Email Using Azure.