Cannot get freebusy to work in Kontact

[ITSEF Admin]

Hi all,

I'm trying to get freebusy to work in my own Kontact (enterprise35) - so far 
without luck. Here's what I see so far:

- We have several users for whom freebusy just works (same Kontact version and 
no significant differences in korganizerrc, as far as I can see)
- For those users, the reqests I can see on the server (apache log) include a 
login name
- If I use a browser to get the freebusy information "manually", I get asked 
for a username and password. Once I supply them, I get the text. Hence, 
freebusy does indeed work correctly on the server.
- In Settings -> Calendar -> Free/Busy -> Retrieve, I have set username and 
password - however, none of those seems to get used by my client. The 
username can be seen in korganizerrc, but it can never be seen in the 
serverlogs.
- Restarting Kontact did not help

Basically, it looks like "my" Kontact refuses to send the username/password I 
have entered when trying to retrieve the freebusy information. Unfortunately, 
I have absolutely no idea why, especially, as it seems to work for other 
users with the same Kontact version.

I have seen the Wiki article on the topic, but that does not seem to have any 
clues. BTW: The Wiki article states that the URL for freebusy is supposed to 
be "https://my-domain.de/freebusy/%EMAIL%.ifb". Is this still correct for 
enterprise35? I'm asking 'cause all our users with working freebusy 
have "https://my-domain.de/freebusy/" in there - which is the way kolabwizard 
sets it.

As usual - any insight is most appreciated.

Regards,

Thomas