OnyakTech User Import is a DotNetNuke module that provides you with quick an easy way to import and export massive user lists into DotNetNuke as registered users.

User Import/Expo Module Features:

Export unlimited users from any portal
Import unlimited users into any portal
Include passwords in the import or leave empty to have passwords assigned for you
Include custom user profile fields in the Export and Import
Runs in a background process to keep performance high!
Add Users to Roles with Expiration Dates
Eliminates Duplicate Users