Has anyone set up CiviMail to use Oauth to connect to Microsoft Exchange? The CiviCRM documentation deviates from that provided by Microsoft. Also, you can't add the account are trying to set up, as you get this error:
Application is not configured as a multi-tenant application. Usage of the /common endpoint is not supported for such applications created after '10/15/2018'. Use a tenant-specific endpoint or configure the application to be multi-tenant.