[kronolith] Error retrieving free/busy information for user at domain.tld: The free/busy url for user at domain.tld cannot be retrieved.

[Jochem Meyers]

I'm sure it's something trivial, but I keep getting the following error when
trying to use the kronolith freebusy information in kronolith:

Error retrieving free/busy information for user at domain.tld: The free/busy
url for user at domain.tld cannot be retrieved.

I have turba installed with the following contact set up:

object_lastname: lastname
object_firstname: firstname
object_email: user at domain.tld
object_freebusyurl: https://domain.tld/horde/kronolith/fb.php?u=user

When I use that url in Outlook, it works like a charm. I'm using (I think)
yesterday's CVS snapshot.

Any ideas why this is happening?

Regards,

Jochem Meijers
Mondrian B.V.