[horde] Apache reverse proxy configuration

[Jaap Winius]

Hi folks,

Has anyone here managed to get Horde 5.x working with an Apache  
reverse proxy configuration? I'd prefer to use a single SSL  
certificate for everything, but so far this doesn't work for me:

         <Location /horde/>
                 Options FollowSymLinks
                 Order allow,deny
                 allow from all
                 ProxyPreserveHost On
                 ProxyPass http://192.168.9.99/horde/
                 ProxyPassReverse http://192.168.9.99/horde/
         </Location>

This sort of construction works for many other web applications, but  
not for Horde 5.x (specifically 5.2.17). In this case I'm quickly  
redirected from https://proxy.example.com/horde/ to  
http://horde.example.com/horde/login.php, which results in a URL "Not  
Found" error.

Any ideas on how to get this to work?

Thanks,

Jaap