Jan-30-2023, 04:12 PM
Disappointed that no replies here or in other forums so went with AppleScript application:
-- defaults write as an application to set mailto handler to Outlook -- plist is under ~/Library/Preferences/ -- osascript -e 'id of app "Microsoft Outlook"' -- will give you the com.microsoft.Outlook do shell script "defaults write com.apple.LaunchServices/com.apple.launchservices.secure LSHandlers -array-add '{\"LSHandlerPreferredVersions\" = { \"LSHandlerRoleAll\" = \"-\"; };LSHandlerURLScheme=mailto;LSHandlerRoleAll=com.microsoft.Outlook;}'" display dialog "Reboot required to take effect" buttons {"OK"} default button "OK"