When initiating a mass update, you have the option to execute it immediately or store it for later use. If granted the Schedule Mass Updates permission, you can also set up a recurring schedule for the mass update.
The immediate processing of a mass update starts promptly for 50 records or fewer. However, if the update involves more than 50 records, there might be a delay of up to one minute before the job commences. It’s important to note that once a mass update is underway, it cannot be halted or canceled.