January 2021 CU for SharePoint Server 2016 is available for download

The product group released the January 2021 Cumulative Update for SharePoint Server 2016 product family.

This CU also includes Feature Pack 1 which was released with December 2016 CU and Feature Pack 2 which was released with September 2017 CU.

The KB articles for January 2021 CU are available here:

  • KB 4493163 – January 2021 Update for SharePoint Server 2016 (language independent) – This is also a security update!
  • KB 4493167 – January 2021 Update for SharePoint Server 2016 (language dependent) – This is also a security update!

The download for January 2021 CU is available here:

Important: It is required to install both fixes (language dependent and independent) to fully patch a SharePoint server. This applies also to servers which do not have language packs installed. The reason is that each SharePoint installation includes a language dependent component together with a language independent component. If additional language packs are added later (only) the language dependent fix has to be applied again.

It is irrelevant which language you pick on the drop down in download center. Even the language dependent fixes are all in the same package for all languages.

After installing the fixes you need to run the SharePoint 2016 Products Configuration Wizard on each machine in the farm. If you prefer to run the command line version psconfig.exe ensure to have a look here for the correct options.

SharePoint 2016 January 2021 CU Build Numbers:

Language independent fix: 16.0.5110.1000
Language dependent fix: 16.0.5110.1000

To understand the different version numbers please have a look at my article which explains the different SharePoint build numbers.

Please ensure to have a look at the SharePoint Patching Best Practices before applying new fixes.

Related Links:


  1. Hey Stefan,

    In the description you stated that in the current month only one language independent patch was released and we should use the last released patch from October. But in the text below it says that in January also a language dependent patch was released, the same is for last month?
    How can I understand this?




    1. Hi Stefano,
      sorry – this was a copy&paste error.
      Its fixed now.


      1. Cool!
        Thank you very much and a happy new year!


  2. it doesn’t like the farm version was upgraded to 16.0.5110.1000 in the Central Admin > Manage Servers in farm. Neither the below PS cmdlet is showing that #.

    The farm version still shows 16.0.5095.1000 that is for Dec 2020 update level.

    The Central Admin > Upgrade and Migration > Check product and patch installation status page does show the updates installed and their version as 16.0.5110.1000

    I’m assuming due to following information

    If a patch changes this version number – will this version number always reflect the version in the KB of the CU it came with?
    Short answer: No


    1. As outlined in my article only the “Check product and patch installation status page” shows correctly if the patch was installed and which components have been updated.

      You should never rely on the database schema version or (Get-SPFarm).BuildVersion.



  3. Hi Stefan,

    Thanks a lot for your support.
    I am planning to deploy December patches for Sharepoint 2016.
    And the new January patches released so, what i should to do.
    Deploying only January patches (it will be enough) or Deploying December first and then January patches.

    May help me please as I am confused 😕


    1. Hi MK,
      SharePoint fixes are cumulative – means you only have to install January CU and it will include everything from all earlier CUs.


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