How to bulk update volunteers from a spreadsheet file

While you can add NEW volunteer information in bulk from a spreadsheet file, you cannot update / edit existing volunteer information in bulk from a spreadsheet file. This is intentional. In volunteer.legal, volunteer information is shared among organizations. If an organization could bulk edit volunteer information, than one organization could accidentally mess up thousands of volunteer records if their bulk edit went wrong -- this would negatively impact many other organizations.

You CAN edit volunteer information on an individual by individual basis by navigating to a volunteers profile, editing the information as appropriate, and clicking "Update". See How to edit a specific volunteers profile for more information.