If this is set to Compatible,
messages will be virus scanned. If this is set
to Secure, messages will be virus scanned
and fi lters will also be applied.
Internal Address In this fi eld you should enter all of the
domain names hosted on your FSE servers.
This will be used to indicate who internal
notifi cations should be sent to. You do not
need to enter sub-domains. Domains
should be separated by semicolons with
no spaces.
Transport External Hosts You should enter the Internet Protocol (IP)
address of each of your Edge Servers.
Addresses should be separated by
semicolons with no spaces.
218 Chapter 5 ??? Using Forefront to Guard Microsoft Exchange Server
Background Scanning
Background Scanning is only available on servers running the Mailbox Role. This
allows for messages to be re-scanned based on their age. This also allows for scanning
with updated AV defi nitions, ensuring that new viruses are detected. This scan in
enabled as a Scheduled Job and is covered later in this chapter (see Table 5.3).
Table 5.3 Background Scanning Settings
Setting Description
Enabled Background Scan if ???Scan This setting is conditional on ???Scan on
On Scanner Updated Enabled??™ Scanner Update??? being enabled.
Scan Only Messages With By scanning only messages with attach-
Attachments ments,you reduce the total number of
messages to scan.
Scan Only Unscanned Messages Scan only un-tagged messages. This setting
is not recommended as it prevents new
viruses from being detected.
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