September 2019 CU for SharePoint Server 2016 is available for download

The product group released the September 2019 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 September 2019 CU are available here:

  • KB 4475590 – September 2019 Update for SharePoint Server 2016 (language independent) – This is also a security update!
  • KB 4475594 – September 2019 Update for SharePoint Server 2016 (language dependent) – This is also a security update!

The download for September 2019 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 September 2019 CU Build Numbers:

Language independent fix: 16.0.4900.1000
Language dependent fix: 16.0.4900.1000

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

Related Links:


  1. Hey Stefan,
    I would kindly ask if you see any problem jumping from July CU 2019 to the September CU 2019 without installing the August CU 2019. We had to skipped the August CU 2019 and want to save some time by installing just the September CU 2019 now (we are installing CU – 2 month on our environments). However, sometimes I heard it could bring some troubles 🙂
    I would appreciate an answer,
    thank you very much,


    1. Hi Tobi,
      there was never a need to install all fixes.
      SharePoint fixes are cumulative – so you can always just install the last one and you are good.


      1. Hi Stefan,
        thank you for your fast answer. I heard that from some colleagues – however maybe it was in earlier releases of SharePoint an issue.
        Have a good day,


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