Processes in Microsoft 365 Insider for installing preview builds, activating subscriptions, and keeping apps up to date with the latest Insider features.
Hi
I take it that you mean the app is running silently in the background, and that it is honoring your choice to not install updates or to notify you about them.
Or do you still get notifications that updates are available?
If you're getting notifications, it typically means you have multiple copies of one or more Office applications installed. Getting rid of the duplicate app(s) fixes this problem.
If it bothers you that the app is running in the background, you might uninstall the app, which would make it impossible for you to get the weekly beta channel updates. Or you might write an Applescript that quits the application.