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.Julien Carlier commented
You change the title of this idea to add Dynamic Alias management with '+' sign. It will have more vote :-)Julien Carlier supported this idea ·Julien Carlier commented