10.14. Calendar
⌘ + r › ms-settings:privacy-calendar
See Determining App List to generate a list of apps for more fine grained control of app access.
10.14.1. Allow access to calendar on this device
Disable Allow access to calendar on this device
This disables all calendar options.
GPO
Computer Configuration › Administrative Templates › Windows Components › App Privacy › Let Windows apps access the calendar
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ENABLED
Default for all apps
Force Deny
Updated: 2021-02-19 Reference