The person who managed the lists/contacts before me uploaded the information with incorrect field mapping, e.g. Lastname, First Name is in the Last Name field and the First Name field is blank. To clean up the database, I"ve exported the contacts with all fields including custom ones and updated the information in Excel. My goal, in essence, is to override the data in all the fields with what is in the Excel spreadsheet for those fields. But when I re-import the corrected file, if there was already a value in a field, the new information was ignored. What are my options? There are too many records to manually correct each one. Thank you for your help.
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