Update 3/26/2026: Simplified the upgrade table.
In May 2024, we shared our Exchange Server Roadmap Update and our plans for the future of Exchange Server. Since then, we’ve been asked some question...
Updated Mar 26, 2026
Version 22.0
Blog Post
Nino_Bilic
Microsoft
Microsoftbroland MI5-Agent It is true that using Exchange P1 or P2 licenses will not work as they do not have Extended Use Rights that provide an unlimited number of Office Server licenses at no additional charge. The truth is that we here are not license specialists and do not have the exhaustive list of Microsoft 365 licenses (or license add-ons) that would work for this. Please work with your Microsoft licensing contact / business desk to sort the exact licenses that would work for your organization.