if I have exchange 2016 Build 1466.3 what cu should I upgrade to

Michael Walsh 61 Reputation points

Hi All

I have two exchange 2016 servers running Version 15.1 (Build 1466.3).
What is the next CU I should upgrade to?

I tried upgrading to CU 22, but the install failed

Best Regards,


Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Kael Yao-MSFT 36,516 Reputation points Microsoft Vendor

    Hi Michael.

    Currently you should be running CU9, which is quite outdated.
    Please note that it is always recommended to keep your Exchange server up to date for better support.

    Since the latest CU version of Exchange 2016 is CU22, please consider upgrading to CU22 and also install the latest SU to protect your server from attacks.
    To get information of the latest CUs and SUs of Exchange, you can refer to this link: Exchange Server build numbers and release dates

    What is the next CU I should upgrade to?
    I tried upgrading to CU 22, but the install failed

    You can go directly to CU22.
    Here is a Microsoft tool which would guide you through the upgrade: Exchange Deployment Assistant
    Once you enter the required information, it would list the detailed steps to upgrade.
    In short, you may need to manually prepareSchema/AD/Domain and install the following prerequisites:

    1. Net Framework 4.8
    2. IIS URL rewrite module
    3. Universal C Runtime in Windows (KB 2999226)

    Then install CU22.

    In addition, you may also use this script to check if the server is already for upgrade: SetupAssist.ps1

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