Clarification on Exchange Server SE Edition and Licensing

Hi everyone,

We are planning to implement Microsoft Exchange Server on premises. Recently, we noticed that Exchange Server 2019 is approaching its end of life, and we don’t see any pricing information for the new Exchange Server Subscription Edition (SE).

In this situation, what is the best approach?

Do we need to purchase Exchange Server 2019 first and then upgrade to the SE version?
If so, how does the pricing for the Subscription Edition work?
Will there be an additional cost (for example, a yearly subscription) after upgrading?

We would really appreciate any clarification or guidance on this matter.

Thank you