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.Greg commented
This is preventing my company from migrating over from another service as we have many existing email addresses out there using these subaddress formats and moving to Office 365 would cause all these to become undeliverable. Please add this feature ASAP.Greg supported this idea ·