For downloading all user’s detail with their additional field

>>Go to Admin Console >> Go to Users >> At the Below you will find option to Create Multiple user at once click on that.>> After this select option as per below screenshot attached to download the list of user.

Steps2 :-You will get CSV file update with Details that is required and for uploading this please follow below steps :-

>>Go to Admin Console >> Users >> Select Add multiple users >> Under Step2 in below screenshot as given below you will get Option to "Change password at the next sign in, kindly uncheck it because by doing this it will not change the user’s password and will update the relevant data .