ICal Refuses Login

Question

I have Server 10.6.4 and applied the most recent security update and since then OD users cannot view their iCal accounts.
OD seems to be working, AddressBook can look up their info, they can log in using AFP, etc. Everything except iCal. This was working well up until two weeks ago and now things are getting very frustrating in not being able to access all the shared calendars!
In Server Admin, Calendar is running. Authentication is "Any Method", SSL is Redirect and the certificate is in existence and seems to be working for iMap SSL
If iCal is on a client and tries to update it claims "Server did not recognize your user name or password for account " XXXX". XXX is the name I gave to the account in iCal when I setup the accounts. In iCal I have XXXX, user name and password that work for AFP for example and the server address DNS name, path that has been working until now "/principals/uids/YYYYYYYY-YYYY-YYYY-YYYY-YYYYYYYYYYYY/", port 8443 and "Use SSL" is checked.
The server is a standalone OD server. ldapsearch seems to be able to access it.
What am I missing?

Answer 1

Still responds that the server does not recognize my account or password. It does not ask me for a new password. So I am guessing that the server does not recognize my OD credentials as an account.
In one of these upgrades has the URL for this changed from uids to users/<user name>? In searching the forums it was suggested that I go to https://mycalendar.server.edu:8443/calendars/users/
and look for user accounts. The web server has no access to this page. The parent page of calendars loads but not any of the pages further down that are only accessible by the _calendar user and _calendar group.
Further there is an article on delegating access to resources and locations, but this gives unknown items when I try it.
http://support.apple.com/kb/HT3897