I'm trying to run a mass update of a group of leads to include data for mobile phone numbers, but the MobilePhone field seems to be missing as an option in the DataLoader mapping setup.
(Someone who worked here a long time ago set up a custom field – Mobile__c – for mobile phone numbers, and I'm just trying to copy all that data over to the default MobilePhone field so that it can be properly mapped to the MobilePhone field on the Contact upon conversion).
How can I update the MobilePhone field on Leads???