We announced at Ignite that we are actively working on bringing dynamic plus aliases to Office 365.
To get around existing usage, the plan is for an opt-in setting. Our ETA is to have this available for all customers by the third quarter of 2020.
I will keep you updated in Uservoice on our progress.Andy Appel commented
Most of my coworkers are still using their personnel gmail accounts because of this feature.
69 votesAndy Appel commented
All us Mac users are still on Lync because "file transfers" are not working.