OK, so I finally really read your post in full. When I go to horde, address book, local ldap, I do have the same entry in my log as you do. Plus, I do see all of my users. If you click on horde, organizing, address book, then on the basic search tab, choose from local ldap and in the matching column, press your space bar and see if you get any users.
You can also from the main imp screen, click on address book and search the ldap database. From the command line, you can type slapcat to see your ldap catalog. You could also try doing a signal-event post-upgrade ; signal-event reboot
from the command line to reconfigure and reboot the server.
One last thing, I just remembered. Could it be possible that the users have been restricted from the ldap database via the horde permissions screen? Check that by logging into webmail as admin, then administration, permissions. What do you see there? If you don't see anything go to the command line and type config setprop horde Administration enabled ; signal-event email-update
, then look and the permissions.
John