Mail Security relies on up-to-date information to detect and eliminate risks. One of the most common reasons that problems occur is that definition files are not up-to-date. Symantec regularly supplies the updated definition files that contain the necessary information about all newly discovered risks. Regular updates of that information maximize security and guard your organization's Exchange mail server against infections and the downtime that is associated with an outbreak.
Mail Security lets you update your protection from threats and security risks using the following tools:
Both methods let you update definitions on demand and automatically, based on the schedule that you specify. You can run Rapid Release definition updates instead of or in addition to LiveUpdate updates. For example, you can schedule daily LiveUpdate and then manually run Rapid Release when a new threat emerges.
Mail Security relies on the definition update process to keep the version support information current. Configure Mail Security to perform definition updates if you have multiple Symantec AntiVirus products on the same computer.
You must have a valid content license to update definition files. A content license is a grant by Symantec Corporation for you to update Symantec corporate software with the latest associated content, such as new definitions. When you do not have a content license or your license expires, your product does not receive the most current definitions, and your servers are vulnerable to risks.
See About licensing