[horde] Adding users is not supported

[Guido Leisker]

Hi all.

Its the fist time I try to get horde running on my server.
Generally it works.

But there seems to be no way to add any users (Administration -> 
Konfiguation -> Users).
"Your authenticationsystem does not support adding new users, or that is 
dissabled"
(Dont know the exactly words, because I have the german version)


What has to be changed that I can add users?
Are horde-users the same like imp-users?


Currently there is everyone administrator and logged in automaticly.


thanks

guido
germany