[WindowsCentral.com]

Are Office updates causing problems, or you're not ready for the new version? Use this guide to disable automatic updates for Office 365 and Office 2016 or 2019.
If you're using an Office 365 subscription to access Word, Excel, Outlook, and PowerPoint, you've probably noticed new visual changes and features appear quite frequently. This is because Office, similar to Windows 10, uses automatic updates to ensure that apps are always up to date with the latest security patches, improvements, and features.

Full story from the WindowsCentral blog...