March 2021 CU for Office Online Server is available for download

The product group released the March 2021 Cumulative Update for Office Online Server.

The KB article for March 2021 CU will be available at the following Location in a couple of hours:

  • KB 4493229 – March 2021 Update for Office Online Server

The download for March 2021 CU is available through the following link:

Related Links:


  1. Are these security updates cumulative? As it says in the description:
    This security update replaces previously released security update 4493192.


    1. Yes, they are cumulative.


  2. Is anyone experiencing issue with opening/creating new document in MS Edge and Google chrome (work fine in IE) after applied the patch?


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