Migrate exchange 2016 with exchange 2019 Coexisting

Euclides 20 Reputation points

I have 2 Exchange 2016 servers in DAG (Bases with user mailbbox replicating between the two servers) with 1 server with a witness disk to form the cluster to share the Quorum between these two with Windows 2016 and Exchanges 2016 and a Transport (Relay) that It is based on a Cisco anti-spam solution, that is, emails can only be reached through anti-spam.

I need to migrate these servers to Windows 2020 and Exchange 2019. Does anyone know how to migrate this type of scenario or any articles that help with this migration?

Exchange Server
Exchange Server
A family of Microsoft client/server messaging and collaboration software.
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  1. Aholic Liang-MSFT 12,951 Reputation points Microsoft Vendor

    Hi @Euclides,

    Exchange 2019 supports coexistence with Exchange 2016 CU11 or later. If not, update your Exchange 2016 first.

    And please note that Exchange 2019 mailbox server role supports one of the following versions of Windows:

    • Windows Server 20221 Standard or Datacenter
    • Windows Server 2019 Standard or Datacenter  

    Then you can refer to the following streamlined steps:

    1.      To prepare the server for Exchange 2019 installation, see the article: Exchange Server prerequisites

    2.      Install Exchange 2019 Server to coexist with Exchange 2016.

    3.      Configure the Exchange 2019 server URL as you would with Exchange 2016  .

    4.      Import the certificate to the Exchange 2019 server.

    5.      Create a DAG for Exchange 2019.

    6.      Start moving mailboxes to Exchange 2019

    7.      Move incoming mail flow for delivery to Exchange 2019.

    Regarding installing Exchange 2019 Server to coexist with Exchange 2016, I have the following article for your reference:

    Exchange 2016 to 2019 Migration Step-by-step Guide (nucleustechnologies.com)

    Exchange 2019 Migration from Exchange 2016 | PeteNetLive

    (Note:Microsoft provides third-party contact information to help you find additional information about this topic. This contact information may change without notice. Microsoft does not guarantee the accuracy of third-party contact information.)

    Additionally , here is a similar thread for your reference: Migrate from exchnage 2016 to 2019 on-prime - Microsoft Q&A

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  1. Euclides 20 Reputation points

    Good morning my friend,

    Thank you very much... you still had the best exchange server in the world!!!

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