Presented by Sree and Juan.
You can now add custom headers to specific outgoing transactions to request special handling of your outgoing request by specific domains.
For example, if you have a relationship with YouTube for Schools, you can use a custom header to identify transaction requests to YouTube.com as coming from your network and requiring special handling.
Chapter 3 of the ScanCenter User Guide describes unsupported custom headers
Section entitled "Configuring Custom Headers"
http://tools.cisco.com/squish/6aEc4A