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You enable IronPort Intelligent Multi-Scan and modify its global configuration 
settings using the Security Services > IronPort Intelligent Multi-Scan and 
Security Services > Service Updates pages (GUI) or the 

antispamconfig

 and 

updateconfig

 commands (CLI). The following global settings are configured: 

Enable IronPort Intelligent Multi-Scan globally for the appliance. 

Configure the maximum size of message to be scanned by IronPort Intelligent 
Multi-Scan.

Enter a length of time to wait for timeout when scanning a message.

Most users will not need to change the maximum message size to be scanned 
or the timeout value. That said, you may be able to optimize the throughput 
of your appliance by lowering the maximum message size setting.

Define and (optionally) enable a proxy server for obtaining IronPort 
Intelligent Multi-Scan rules updates (Security Services > Service Updates). 
If you define a proxy server to retrieve rules updates, you can optionally 
configure an authenticated username, password, and specific port when 
connecting to the proxy server.

Define and (optionally) enable a download server from which to receive 
IronPort Intelligent Multi-Scan rules updates (Security Services > Service 
Updates).

Enable or disable receiving automatic updates to IronPort Intelligent 
Multi-Scan rules, and also specify the update interval.

The proxy server setup is available via the Security Services > Service Updates 
page. For more information about specifying a proxy server, see 

. Note that the proxy server is global in that all services 

that are configured to use a proxy server will use the same proxy server.