Archive an event when you want to remove it from the active calendar and sales pipeline while keeping its record.
Steps
Open the event for editing.
In Event Info, open the Archive section.
Select Archive Event and save your changes.
To restore it to active views, find the event in a report/search that includes archived records, clear Archive Event and save.
Archive is different from cancel
Archiving changes active-view visibility. It does not, by itself, cancel the event, stop its scheduled automation, refund payments or reverse an invoice. Use the cancellation controls if you need to cancel the event, and review its financial records separately.