I have a simple startup microflow: If toLowerCase($currentUser/Name) = 'mxadmin' (or another name) then show a form in content. It does not get executed (simple blocking message action does not show either). Are there things I cannot do in the startup microflow, or is some info not available yet?
What do you mean with startup microflow? If this is the 'after startup' microflow then no, this won't work, as there are no logged in people at that time. 'Startup' is referring to the runtime server itself.
If you are referring to the microflow being executed for 'default home page' then it should work (assuming your logic is correct)