Hello!

We have two modules at present to migrate data from Dolphin and SocialEngine to UNA. 

To migrate data from some another format to UNA data should be converted. If you have encrypted passwords you need to find out which encryption function was used to create them, otherwise passwords will not work. 

In any cases you need to create script which should prepare data for transferring it to UNA. You may use migration Dolphin to Una module as base for such kind of script.