How to query the users that are not registered in the Self Service Password Registration

Hello all,

I am deploying the SSPR, but in this case the user is asking to use only the Web options for registration, so no client agent is going to be deployed in the workstations.

SO in order to know programmatically (VBScript, powershell) is there a way to query or to get a list of usersthat are no registered in the Self Service Password Registration?

Any help is appreciated

Regards