As with MF 1.8, you need a load-balancing license, and also as with MF 1.8, the load balancing factor is a number between 1 - 10000. The default is 100.
Remember to stop the ICA daemon before making these tweaks, by using ctxsrv stop browser, and restarting it afterwards.
With ctxcfg, use -l to limit the number of users permitted on the server, and -k loadfactor to adjust the load factor.
Normally you'd only want to do this if one or more servers are significantly more underpowered than the rest, or one or more servers have a heavier load due to users' specific application requirements.
Use ctxcfg -g | grep loadfactor to view the existing load factor (and prove your tweaks are set).
To display the load for a particular server or application, use ctxqserver -app [application-name | server-name]
I hope this helps CitrixEngineer@yahoo.co.uk