Hi Steve,
I’ve been getting email notifications on product updates 8x8’s newsletter called In The Loop.
It does a good job of explaining product updates and providing notice to items that are end of life.
While I couldn’t find anything related to your MS Teams integration, this newsletter is a start to stay on top of the changes.
I’m not sure exactly how I signed up for this but if you want to send a private message with your email, then I can forward the referral link from this month.