Hi, if anyone does not know where to find the utility:
Connect to the Unity Server and try navigating to C:\CommServer\Utilities\SubscriberInformationDump\
There is SubInfoDump.exe
If you don't have it, please download from:
http://www.ciscounitytools.com/APP_subr_info_dump_3x.htm
Regards,
-- Adrián.