2.4.x filters in Voice-Mail-User-ID (this corresonds to AVP_IS_SUBSCRIBER in DOHPropTest). You can also remove Custom-Attributes-12, 13, 14. 3.0 filters on 12 and 14 when deciding if a user can be imported or not so it might be good to get rid of all 3.
You can use dbWalker in 2.x to clean subscirbers, but if you're trying to import them into 3.0, you need to clean them by hand at the moment. In the case of Ex5.5 it's easy with the built in custom properties view of the administrator. With 2000 you have to use ADSI Edit or the forethcoming "BunnyKiller" application that'll be available on CCO shortly (it's just an AD viewer that shows folks tagged as subscribers and lets you manually clean them).
Jeff Lindborg
Unity Product Architect/Answer Monkey
Cisco Systems
lindborg@cisco.com
http://www.AnswerMonkey.net (new page for Unity support tools and scripts)