Load Balancer Drain

Draining a hardware load balancer’s connections to a pool server is a task that should be done in conjunction with the Prevent New Connections for All Services option in the Lync Server Control Panel. The Lync Server services have no method of managing a hardware load balancer, so if one is being used for the web services traffic, it must be started, stopped, and drained independently. Failure to perform this step will result in the server receiving connections to the IIS web service, but can potentially generate errors for the client.