During a virus outbreak

Applies to: Microsoft Antigen

During a virus outbreak scenario, it is recommended that you enable the Scan on Scanner Update feature in General Options. This causes e-mail to be scanned repeatedly each time that your scan engines are updated.

Usually, you would not select this setting; however, if your server has a significant amount of free capacity and the e-mail experience is not affected, leaving this feature on all the time ensures the highest level of protection. Keep in mind that selecting this feature can have a considerable performance impact on a busy server, because it leads to significantly more scanning at the Store.

You can also use Background scanning (which applies the latest signatures for the engines chosen for the Realtime Scan Job) to scan a Mailbox server after a known outbreak has occurred. This will clean the server of malware that was received before protection signatures were available. If additional information is known about certain characteristics of the malicious e-mail, file filters or Sender subject filters can be enabled in the Realtime Scan Job.