Gonna be difficult.  The only way I can see this happening is if you peep in to the dnn databbase, find the users table, make a note of all the feilds that are used then program access to periodically update your SQL database.  If you know what you are doing with VB, this sort of thing can be acheived with access

 

I hope that helps

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We have also done the same thing. Instead of adding users automatically on the fly,we add them periodically (every hour or twice everyday) using a DNN scheduler. This is how...

1. We wrote a DB trigger in our third party application database which listenes for a user addition and puts the necessary user information in an intermediate table.

2. The DNN scheduler will run on the specified interval and look for any new users in the intermediate table and use the DNN API to insert a new user to the portal. (You should always talk to DNN DB using the API. Check the UserController class in DNN source)

Regards,

Uchitha.