Group Expiration Notification Email Not working

Hi TimBosch 

Thanks for your answer!

I don't know the technical magic behind this so it's all an equal mystery to me  (Group C & D are more or less the same kind of groups.)

If Teams notifications was the only option I would just have adapted to that but I like the idea of getting these email notifications since the feature (at least on paper ) is there... Or if we for a fact know when they are sent and not.

So I can create a new Group and set a specific Expiration date 2 days from now? That would be nice of course, how do I do that?

Edit: Great! I did a deeper search and found the -ExpirationDateTime for Update-MgGroup, I will try that! 

Maybe there other prerequisites that most take for granted but still need to be checked... hmmm