John, You are absolutely correct.  Due to a specifications change from Citrix we are required to not install a webserver within the XenServer OS/Hypervisor when installing OMSA.  Connecting to OMSA must be done via OpenManage Web Server and the "Manage Remote Node" option. This connection method is equivalent to connecting to the OpenManage Server Administrator VIB for ESXi (which also does not have the launch option outlined in this thread). Hope this helps! Wayne Ricketts 
Hello We have some Citrix XenServers on our network on which I have installed Open Mange Server Administrator (OMSA). We have a pair of EverRun servers on XenServer version 6.0.2 with OMSA 7.1.0. We have another test XenServer on version 6.2.0 with OMSA 7.4.0  They have been added to Open Manage Essentials (OME version 2.0.1.2222) and appear to be reporting correctly.  I have noticed that if I go to Manage > Devices, the Server Administrator is not clickable. I can click on the iDRAC but not Server Administrator. Is this by design or am I missing something? Many thanks in advance. John
Can I view OMSA on a XenServer ?