Upgrade Exchange to the latest Cumulative Update Install Exchange Mailbox servers using the Setup wizard You can only do these types of downgrades by uninstalling Exchange, reinstalling Exchange, and entering the correct product key.įor a list of Exchange Server versions and how to download and upgrade to the latest version of Exchange, see the following topics:Įxchange Server build numbers and release dates You can't use a valid product key to downgrade from Enterprise Edition to Standard Edition or revert to the Trial Edition. You can use a valid product key to move from Standard Edition to Enterprise Edition. No loss of functionality occurs after the Trial Edition expires, so you can maintain lab, demo, training, and other non-production environments beyond 120 days without having to reinstall the Trial Edition of Exchange or entering a product key. You can use a valid product key to move from the Trial Edition (evaluation version) of Exchange to either Standard Edition or Enterprise Edition. For more information, see Enter your Exchange Server product key. When you enter a valid product key, the supported edition for the server is established. The server editions are defined by a product key. Note that the recovery database doesn't count towards these limits. While you can create more databases than the described limits, you can only mount the maximum number of databases that are allowed by the edition of Exchange. Standard Edition: Limited to five mounted databases per server.Ī mounted database is a database that's in use (an active mailbox database that's mounted for use by clients or a passive mailbox database that's mounted in recovery for log replication and replay). Exchange Server 2016 and Exchange Server 2019 are available in two server editions:Įnterprise Edition: Can scale up to 100 mounted databases per server.
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