Server VDAs lose registration with the controller once about 24 sessions is reached on one server VDA after updating site to 7.12.  The error message seen is  "(413) Request Entity too large"

1. Take backup copy of BrokerService.exe.config file on both Xendesktop controllers
2. Open BrokerService,exe.config file in Notepad/Wordpad as Administrator
3. Change the value of the bindingConfiguration from "ControllerWsHttpBinding" to "ControllerWsHttpBindingWithLargeMessageSize" in the following section:
4. Change the value of the endpoint address from http://localhost:80/Citrix/HighAvailability/SecondaryBrokerControl to net.pipe://localhost/ Citrix/HighAvailability/SecondaryBrokerControl in the following section:
5. Save the config files after these changes are made.
6. Restart the Citrix Broker Service on each Xendesktop controller

Problem Cause