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
Question related to moving some mail connectivity over to Modern Auth, but it's technically more of an Azure AD question than an Exchange Online question:
If creating an Azure AD app registration for delegation/application-based permissions over Graph, I noticed that client secrets now have a max expiration of 2 years, which is good in my mind.
Other than tossing an event on my IT unit's shared calendar and hoping someone takes note of it if I happen to be out of office, are there any built-in mechanisms for sending expiration alerts to admins/registration owners for these client secrets, as to avoid outages when they expire? (Similar to certificate expiration alerts for SAML/enterprise applications... they'll nag you 3 times in the final 2 months prior to expiration)