This article describes update 4484175 for Microsoft Office Online Server that was released on December 10, 2019.
Known issues in this update
After you install this security update, Office Online Server logging will be set to Verbose by default. We recommend that you change this setting to Medium by running the following command:
Set-OfficeWebAppsFarm -LogVerbosity “Medium”
Note After you run the command, you have to restart the Office Online Service. To do this, run the following command:
Improvements and fixes
This update fixes the following issue:
Web Parts on SharePoint Server 2016 are missing the top toolbar and have filter buttons on pivot charts not working correctly. This issue occurs when you use Microsoft Edge or Internet Explorer as a browser.
How to download and install the update
This update is only available for manual download and installation from the Microsoft Download Center.
Microsoft scanned this file for viruses by using the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to it.
To apply this update, you must have Microsoft Office Online Server installed.
You don't have to restart the computer after you install this update.
For the list of files that are included in the update 4484175, download the file information.
Learn about the standard terminology that is used to describe Microsoft software updates. The Office System TechCenter contains the latest administrative updates and strategic deployment resources for all versions of Office.