Upgrade exchange 2016 CU14 to CU18

pavan kumar 371 Reputation points

I am planning to upgrade from exchange 2016 CU14 to CU18.

Can I do it directly my installing a required .net framework or I have do to CU16 and then CU 18.

Also, the active directory schema upgrade is required for CU18 from CU14?


Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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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 37,671 Reputation points Microsoft Vendor

    Hi, Pavan.

    Agree with Ashok, you may upgrade from CU14 to CU18 directly.
    You need to run PrepareSchema/PrepareAD/PrepareDomain since there are schema updates.


    After installing the .Net Framework 4.8, you need to immediately upgrade to the latest CU.


    Besides, it is always recommended to have a backup of your server via Windows Server Backup just in case something goes wrong after the upgrade.

    And in addition, is there any concern that you don't choose to upgrade directly to CU19(the latest CU version)?
    It is suggested to always keep your servers as up to date as possible.

    If the response is helpful, please click "Accept Answer" and upvote it.
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  1. Ashok M 6,506 Reputation points

    Hi @pavan kumar ,

    Yes, you can upgrade from CU14 to CU18 directly. Prepare the Active directory with PrepareSchema/PrepareAD/PrepareDomain.

    Upgrade .NET framework to 4.8, install other windows pre-requisites and install the Exchange CU18

    Please find the below screenshot for the AD value change,



    If the above suggestion helps, please click on "Accept Answer" and upvote it.

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