2 answers
Hi Lionel,I trust you are doing very well.You can do that by exporting all the names from object say contact in a CSV. Once you export you could copy paste the existing data in an excel sheet to this file in a new sheet and compare.You can refer the below link for information on comparing data in excel.http://www.wikihow.com/Compare-Data-in-ExcelI hope it helps you.Kindly let me know if it helps you and close your query by marking it as solved so that it can help others in the future.Thanks and Regards, Khan Anas