I am working since quite a while to get MDM working in our environment, but it seems that there is quite a certificate issue that relates to our root certificate (from CACert) and maybe (most likely) the MDMSecure Certificate. We have a some bit of strange behaviour concerning iOS4 & iOS 5 devices. On iOS4 we have the complete functionality (Agent & Portal) whereas Profiles are not getting installed on iOS5 devices (Portal works perfectly). The root certificate (from CACert) never gets accepted (on iOS5), and seems to be a known bug (http://bugs.cacert.org/view.php?id=540) . Taking a closer look at http://support.apple.com/kb/HT4999 it is described, that certificates with MD5 hashes are not any more supported (since iOS5). Regrettably MDMSecure seems to use a MD5 hash. I would be happy if LANDesk people could comment on this point.
Thanks a lot folks