October 2020 CU for Office Online Server is available for download

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

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

  • KB 4486674 – October 2020 Update for Office Online Server

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

Related Links:


  1. Hi,

    I’ve installed this update,

    However when viewing the build version of OOS (with powershell or http response) it stays the same, only difference is that the update has been installed on the server, is this normal?

    How can i be sure that the update is succesfully installed? (I(ve installed this update because there were unsupported MS Word objects and I was using an older version of OOS (16.0.10340.20006))




    1. Hi Brecht,
      from my understanding the version should be different. If you have doubt you should open a support case with Microsoft.


  2. Hi Stefan!
    Is there a plan that OOS will support also Windows Server 2019 in the future? I have a setup done without errors, but i’m not sure if it’s a good idea to use this for production. Or maybe it is already safe? 😉




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