Update (2024-4-19)

Re-opened as it's available to implement
Reference : https://techcommunity.microsoft.com/t5/exchange-team-blog/announcing-client-credential-flow-for-smtp-auth-in-exchange/ba-p/3869966

Update (2022-11-30)

At least implement (or document) support for mail with Office 365 with Oauth 2 as its suppport for Basic Authentication is ending at end of 2022.

Original description:

We need a generic implementation for configuration of OAuth 2.0 that goes beyond Gmail. For example Microsoft Office 365 SMTP server with OAuth 2.0. Maybe this is already possible but it's not clear how it works.

Notes
At the moment it's not completely clear how to configure Gmail for OAuth which was implemented in MGNLMAIL-66 but removed in MGNLMAIL-83.
Can we create a generic set of configuration parameters for all OAuth 2.0 systems or will separate classes be required? Should the customer/partner implement an interface?
A step-by-step would be helpful. See DOCU-2045.