Upgrading your organization from current versions to Exchange Server SE

AdrianL1300 and PetrVlk The truth of the matter is that we here are not Microsoft 365 licensing specialists. There are many different licenses (or licensing add-ons) that we have, and we do not have a comprehensive list of all of the combinations that might be used to satisfy the requirements. We have provided some examples that are clearly documented (like terms related to E3/E5) but the truth is that to find out what the best licenses are for your particular situation, you should reach out to your account teams / MS business desk. What we can tell you is how licensing is changing, but we simply do not have the information how various licenses or add-ons might be used to best fit various levels of Microsoft 365 licenses that our various customers have and be most cost effective.