Every morning our Xenith clients get ICA: Connection Timed Out the first three or four times they logon.
This is the xen.ini statement for the PNAgents..

IcaBrowsing=HTTP
PnliteServer=172.80.80.xxx,172.80.80.xxx ReconnectAtLogon=2 Timeout=200

I also have the ip addresses of each DDC listed under the DHCP Option 181