sorry, I can see where we misunderstood each other.
If I have egroupware, Horde & groupoffice installed on the same system, I'm sure I can only ever use one of these programs at any given time, right? Or is there a way to run them simultaneously, thus allowing user1 to make use of features offered by groupoffice, and user2 using features from Horde.
This doesn't sound possible to me though, but that's what I understood from what you said.