It would be convenient to be able to clone an authentication profile, both within and between projects.
gruve which version of SoapUi are you using? The open source-free version or SoapUI Pro (= ReadyAPI!)? I don't know for the free version but I'm using ReadyAPI! and there is a possibility to inherite the Authorization on different levels.
If you create an Authentication on Project level, you'll be able in the AuthorizationManager to tell it that everything underneath that project needs to inherite from the parent. As thus, You only have to add Authentication 1 time.
As such.
Does this help?
Kr,
AboveAndBeyond