[{"_id":ObjectId("621e816e7a938400016c5c64"),"Resource":"abc@gmail.com","School":{"Class":[{"Type":"ABC","Slots":[{"id":"","Duration":"1 week","Status":"Released","Selected":true},{"id":"123","Duration":"1 week","Status":"Released","Selected":true}]}]}}]

db.collection.update({"Resource":"abc@gmail.com","School.Class":{"$elemMatch":{"Type":"ABC","Slots.Status":"Released","Slots.id":"","Slots.Duration":"1 week"}}},{$set:{"School.Class.$[outer].Slots.$[inner].Status":"Confirmed"}},{"arrayFilters":[{"outer.Type":"ABC"},{"inner.Duration":"1 week","inner.id":""}]})