I have inherited a CUE 3.1(1) system from someone else. It's a 100 user mailbox system integrated with CM.

I know its possible to download license types for each version of CUE on CCO, but i'm unsure how or where this links in with the number of users.

So for example if I upgraded to a newer version of CUE code, would I need somekind of specific license to this system or could I just upgrade without worrying about the current license. The previous user has left no stored license files that i can find.

Also what If I had to factory default and rebuild, would I hit similar problems?