Description of problem

As reported here: https://dnncommunity.org/forums/aft/3003
MS is ending support for basic authentication see:

In September 2021, we announced that effective October 1, 2022, we will begin disabling Basic authentication for Outlook, EWS, RPS, POP, IMAP, and EAS protocols in Exchange Online. SMTP Auth will also be disabled if it is not being used. See full announcement: Basic Authentication and Exchange Online – September 2021 Update.

This will mean that sending emails from DNN using an Office 365 / Exchange / Outlook account would no longer be possible.

Description of solution

To be discussed..

Description of alternatives considered