...
Note: When building your User List in Excel, you will want to make sure that the file does not have any active filters. If you have data filtered out that is not displaying on the spreadsheet, when you go to process the Mass User Upload, the users that seem “filtered out” will still be included in the upload.
Once you have an Excel file prepared, click on the … button to upload it. If your first row is of headers, be sure to check the The first row of my file contains column headers checkbox. You can also edit/update existing users with a Mass User Upload. Once you have uploaded the file and checked the appropriate boxes, click Next.
...