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Supported hybrid deployment scenarios for Exchange 2019Įxchange 2019 supports hybrid deployments with Microsoft 365 or Office 365 organizations that have been upgraded to the latest version of Microsoft 365 or Office 365. Supported if all Exchange 2013 and Exchange 2016 servers in the organization meet the requirements as previously described in this table. Mixed Exchange 2013 and Exchange 2016 organization Supported with Exchange 2016 CU11 or later on all Exchange 2016 servers in the organization, including Edge Transport servers. Supported with Exchange 2013 Cumulative Update 21 (CU21) or later on all Exchange 2013 servers in the organization, including Edge Transport servers. The supported coexistence scenarios between Exchange 2019 and earlier versions of Exchange are described in the following table: Exchange version

Supported coexistence scenarios for Exchange 2019 To actually install Exchange 2019, see Deploy new installations of Exchange. Also, make sure you understand the coexistence scenarios that are supported for Exchange 2019 and earlier versions of Exchange.

Before you install Exchange Server 2019, we recommend that you review this topic to ensure your network, hardware, software, clients, and other elements meet the requirements for Exchange 2019.