When i use Liveoffice , i don’t see the .unx universes ( just appears the word connecting and this one disappears). On the other hand, i can work with .unv universes. That’s work fine.
About the rights, i use the admin user to do my tests.
As far as I know, the use of .UNX universes is not supported in Live Office.
As I have read, it is not even sure, if this functionality will be available in the future…