Bizweaver now supports both Basic Authentication and OAuth Authentication (for Exchange Online) for configuring SMTP connections used to send emails in workflows and system notifications. Oauth authentication (for exchange online) requires: a valid Client ID, Client Secret, and Tenant ID. Basic authentication requires: The SMTP server address, the SMTP server port number, a valid email user, a valid email password

Go to the Oauth Setup Instructions for instructions on how to configure SMTP Oauth with Microsoft Exchange Online