Microsoft has released the Microsoft Office non-security updates for January 2021. The updates fix known issues that affect the Windows Installer (MSI) versions of Office 2016 products.
Microsoft also released non-security updates to Current Channel for Microsoft 365 Apps to fix Excel errors and Outlook crashes.
January 2021 non-security updates
Below is the complete list of updates and products of Office to which they apply.
Some updates may require a restart
After you apply some of this month's Microsoft Office updates, you may also be prompted to restart computer you.
If you experience problems after updating your Office installation, you can easily uninstall the update by following these steps:
1. Go to Home, type View Installed Updates in its context Windows Search and then press Enter.
2. In the list of updates, locate and select information causing you problems, then select Uninstall.
Depending on the Office update you are using, you may also need to apply and others updates to face/ completely fix the issues on your device (for example, update KB4484509 requires its installation KB4493157).
Source of information: bleepingcomputer.com