Processes in Microsoft 365 Insider for installing preview builds, activating subscriptions, and keeping apps up to date with the latest Insider features.
Hi
It just means that the file you are trying to open is not located in the Mac OS documents folder. Mac OS doesn't like that.
Either move the files to your Mac OS Documents folder or go to System Preferences > Security and Privacy. On the Privacy tab, in the left side choose Full disk Access and in the right side check Microsoft Word. You will have to unlock the box by clicking the lock in the lower left corner before you can change the setting.