Database
[{_id:ObjectId("5fb9a5e7befa50006c44aae0"),name:"A",program:"A",bio:"A",tasks:[{taskId:ObjectId("5fb73d030e6264002db1073c"),status:"pending"},{taskId:ObjectId("5fb744af0e6264002db1076c"),status:"pending"},{taskId:ObjectId("5fb73e550e6264002db10742"),status:"pending"},{taskId:ObjectId("5fb746e50e6264002db10776"),status:"complete"}]}]
Query
db.collection.update({_id:ObjectId("5fb9a5e7befa50006c44aae0")},{$set:{"tasks.$[t].status":"complete"}},{arrayFilters:[{"t.taskId":{$in:[ObjectId("5fb73d030e6264002db1073c"),ObjectId("5fb744af0e6264002db1076c")]}}]})