Update: The full timeline for retirement of Basic Authentication in Exchange Online is now published in Basic Authentication Deprecation in Exchange Online – September 2022 Update.
In February 2021...
Updated Sep 01, 2022
Version 19.0
Blog Post
Greg Taylor - EXCHANGE the Basic Auth deprecation will happen in over a month and a half. My organization is worried about not being on time for an upgrade (releasing a new version changing the authentication, and upgrading all the deployed instances) and losing this functionality, which is critical for some clients.
Is there anything else we can do other than waiting for an update? I am wondering why the OAuth implementation is taking so long for this API... Is it because you have alternative services that provide the same information, and most people use those instead of what we are using? Because, in that case, we could try switching to it before the deadline arrives.