I tried this and found that at the time there were massive limitations. Admittedly it was a few years ago, but they didn’t make it simple to just have a forwarding mail group so that I could have a shared mail address/distribution list to myself and my wife forwarded to our inbox, and you basically had to have a shared email box that was separate to your primary. It didn’t pass the spouse test considering this is a basic feature that everyone has so it didn’t make it past the trial.

I was actually surprised at how limited the 365 was, I don’t remember the other limitations but they seemed fundamental.