If your deployment uses load balancers to manage multiple security servers, you can perform an upgrade of the Connection Server infrastructure with zero down time.

Note: To use Unified Access Gateway appliances instead of security servers, you must upgrade the Connection Server instances to Horizon 6 version 6.2 or later before installing and configuring the Unified Access Gateway appliances to point to the Connection Server instances, or the load balancer that fronts the instances. For more information, see Replacing a Security Server with a Unified Access Gateway Appliance.