From Dencom New Zealand:
Dencom Global Address Book is an application that integrates into Outlook in CW mode, which allows many clients to share a common set of e-mail contacts. It does not replace Outlook contacts. The application consists of 3 parts: a separate application that creates and manages the database of contact records, an Outlook client that allows access to the database. The client can run in two modes. Create/update mode provides add, delete, and modify records functionality. The second one is read-only mode that still allows clients to send e-mail, but prohibits details editing; the second client option is an Outlook add-in, so that you can sync an Outlook contacts folder with the database. The application fits any kind of network that requires sharing a common set of contact details. Version 10.0.5 may include unspecified updates, enhancements, or bug fixes.