I'm not even sure the .csv option you offer to import your schedule into Outlook even works anymore. The format .ics is the standard calendar format now. If it does, it's a manual process that requires an export from Arbiter and import into a referee's choice of calendar application. Being able to subscribe to your schedule (or calendar in Arbiter) would automate things by automatically updating your calendar app when changes occur to your officiating schedule.
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https://example.com/calendar.ics is the typical format of a calendar subscription.
|Needed by||Yesterday (let's go already)|