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Installing the De-Duplication Filter

The De-Duplication Filter for Symantec Enterprise Vault (SEV) prevents multiple copies of the same email being archived. For example, if an e‑mail is sent to multiple recipients, it is sometimes the case that recipient accounts are hosted across multiple Exchange servers. If these servers host their own journals, there will then be multiple copies of the original email, one in each journal on the recipient mailbox servers, plus another one in the journal on the sender's mailbox server.

Integration with the De-Duplication Filter for Symantec Enterprise Vault (SEV) is provided through a custom filter, wgnsevdd.dll. In this guide, the term ‘De‑Duplication Filter’ refers to this custom filter.

This section contains the following topics:

Overview

De-Duplication Filter Architecture Diagram

Terminology

Install the De-Duplication Database

Install the De-Duplication Filter

Register the De-Duplication Filter

Configure the De-Duplication Filter

Configure the Unique ID Property List

Create Custom Registry Values

Performance Counters