Reference: Policy Pages Settings : Optimization policy settings : SaaS Accelerator
  
SaaS Accelerator
SaaS Accelerator improves performance for many SaaS applications.
Accelerating SaaS applications requires configuration on the SteelHead SaaS Manager (SSM), see the SteelHead SaaS Manager User Guide for more information.
In the SaaS Acceleration Settings section you can enable SaaS Acceleration and allow Proxy Chaining Interoperability.