To run the export, C:\Program Files (x86)\RightFax\AdminUtils>impuser.exe -fYOURSERVERNAME -uUSERNAME -pPASSWORD -oFILENAME.CSV
Replace with you RightFax Server Name, a RightFax Username and Password. This user must have Administrative rights to your RightFax Server.
After you run the IMPUSER.EXE to create the file, open the file in Excel. Set your delimiter to COMMA. Here are the column names to match the common highlighted fields.
Also attached is a sample Excel file with the header names in Row 1 and a Sample User in Row 2. Copy Row 1 into your spreadsheet and you will see the fields.