Dear All,
Apologies for putting same blog again for common topic.
I checked many blogs but unfortunately I am still stuck with logon load balancing functionality. May I have some expert opinions on this.
I want to configure logon load balancing HTTP requests using Message server.
Scenario -
As per Help.sap.
http://help.sap.com/saphelp_nw04/helpdata/en/28/75153a1a5b4c2de10000000a114084/content.htm
Prerequisites - are already present.
Parameter
ms/server_port_0 = PROT=HTTP,PORT=81$$ is set and
The ICF Services sap/public/icf_info/logon_groups and sap/public/icf_info/urlprefix must be activated (transaction SICF),
are already activated.
SMLG - logon group is created.
When I provide "Logon group" in SICF services, for example (webgui) and test logon load balancing its giving below URL.
http://<message server host>:<ms http port>/<service path>/<service name>
Which do not work 
If we modify respective URL with domain as below , logon load balancing works fine.
http://<message server host>.<domain>:<ms http port>/<service path>/<service name>
Does anyone have any idea from where parameter <domain> is picking and how its working.
little hint, may be helpful.
Thanks,
Regards,
Bond