Microsoft has announced they are discontinuing support for basic authentication (login and password) for IMAP access in October 2022. This affects UnForm 10 inbound sources, which use IMAP to access mailboxes. Starting at version 10.0.23, UnForm can be configured to use the XOAUTH2 protocol, which is supported as a modern authentication method.
This document describes how to register an application in Microsoft 365, and how to configure that registration in UnForm.
UnForm 10 and Microsoft 365 Modern Authentication