I managed to upgrade my home server to UCS 5. It seems to have been successful, but I also have portal issues. All my existing apps seem to be working so I think I’m fine to stick with it for a while, but none of the management functions are visible in the portal. I have to manually go to /univention/management to get to the settings. There doesn’t appear to be a way to get there from the portal after log in as there was in version 4.
Maybe if I wait long enough it will show up, but I’ve tried different browsers so I don’t think it’s just a cache problem.