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.Alex Filatov supported this idea ·Alex Filatov commented
This email alias feature would be a great addition to outlook. Similar feature exists in other email providers that allow for a suffix to be added to the username part of email with a + plus sign.