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APPLIES TO: 
2016 2019 
Subscription Edition
Tip
Looking for the Exchange Server 2019 release notes? See Release notes for Exchange Server 2019.
Welcome to Microsoft Exchange Server Subscription Edition (SE)! This topic contains important information that you need to know to successfully deploy Exchange SE. Read this topic completely before beginning your deployment.
Note
Exchange Server Subscription Edition is not yet available.
Exchange Server Subscription Edition (SE) Release to Manufacturing (RTM) is code equivalent to Exchange Server 2019 CU15, except for the following changes:
- The License agreement, an RTF file shown only in the GUI version of Setup, is different
- The product name changed from Microsoft Exchange Server 2019 to Microsoft Exchange Server Subscription Edition
- The build number
New changes are introduced starting with the Exchange Server SE Cumulative Update (CU) 1.