To configure advanced scanning options for Auto-Protect and background scanning

1. In the console on the primary navigation bar, click Scans.

2. In the sidebar under Views, click Auto-Protect.

3. Under Advanced Scanning Options, check any of the following:

   Scan message bodies (applies to AV only)	Detects the risks in message bodies. The option is disabled by default.
   Exclude outbound scanning on mailbox server	Prevents the scanning of outbound messages so that they can be scanned at the Hub Transport. This option is enabled by default.
   On virus definition update, force rescan before allowing access to Information Store	Performs a scan each time definitions are updated and a user attempts to access a message. Microsoft Exchange does not allow access to any messages in the store until Mail Security re-scans the message with the latest definitions when a user attempts to access a file. As the definitions are delivered frequently, the scan might not complete before new definitions are available. This can impact overall mail throughput. This option is disabled by default. Note: If this option is selected, background scanning of the store restarts after every virus definition update. Ensure that you do not select this option if you want to complete background scanning of the entire store. See About keeping your server protected
   Virus scan messages during SMTP transport (recommended for perimeter or gateway servers)	Enables the virus scanning of messages as they pass through the Hub Transport server or the Edge Transport server. This option is enabled by default. Note: Enabling Background scanning and Rescan on virus definition update along with Rapid Release definitions can significantly reduce performance.

4. On the toolbar, click Deploy changes to apply your changes.

   See Deploying settings and changes to a server or group