March 2020 CU for Office Online Server is available for download

The product group released the March 2020 Cumulative Update for Office Online Server.

The KB article for March 2020 CU will be available at the following Location in a couple of hours:

  • KB 4484270 – March 2020 Update for Office Online Server – This is also a security update!

The download for March 2020 CU is available through the following link:

Related Links:


  1. Is there a full list of these updates please?
    I am looking to patch an Office Online Server environment as part of a SharePoint farm, and is there a full list of the released CU patches available please?


    1. Hi Mike,
      it is sufficient to install the last one as these are cumulative updates.
      No need to install an older one.


  2. Hi Stefan, thanks for everything you do! Do you know if there is or will be a later OOS build? The latest i am aware of is from November 2018. We have Office Online Server for SharePoint 2016.


    1. Hi Rob,
      Nov 2018 is the most current full build for OOS available.
      You need to install this and then install the latest OOS CU on it to get the most current build.


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