I am new to salesforce. The last user in my company imported her leads as contacts. I would like to have all these contacts be leads, to eventually turn into contacts. Is there anyway to do this without deleting all the contacts and starting over? I no longer have the list she imported. I guess im looking to export all of this data, and then reimport it into the correct categories.
If you have Enterprise Edition or Unlimited Edition, you can use the Data Loader to export all of those contacts and re-import them as Leads and then delete the exported Contacts.