HI All In short you cant do what I was expecting you to do.You have to have OMSA 9.3 running on a different server (and that has it's omen problems)Use the link at the bottom of the logon screen "Manage Remote Node" and fill in the details. 
Hi AllJust got my hands on a couple of new R540.Installed ESXi-6.7.0.Installed OMSA using the instructions <ADMIN NOTE: Broken link has been removed from this post by Dell> It is installed as I can see it in the package list.I get to the step "Accessing Dell OpenManage Server Administrator.",  browse to the port 1311 the browser states. This site can’t be reached  Any clues as to why it is not working. (Yes I have rebooted) --David
OMSA on VMware "This site can’t be reached"