Navigation:  Exchange Server Toolbox > Configuration > Antivirus options

 

Here you can adjust the settings for using your installed antivirus software.

 

The antivirus function is integrated into the rules engine as a condition.

Checking the box to use the antivirus function will automatically create a default "Antivirus" rule in the rules engine.

You may change the antivirus type (use ClamAV or your installed antivirus software) or the action on virus detection either here or directly in the appropriate rule.