any Disk quota management software?

I would like to find a disk quota management software for win2k server.

1. The software shall be able to run as a local process or application in the win2k server.
2. it shall be able to assign disk quota to individual users.
3. it shall be able to enforce disk space usage quotas on any file, directory or sub-directory
4. it shall be able to send warning and notification messages to network users, administrator and to the event log automatically