In regards to LDAP, if I read it correctly, you can add the users into the CUCM directory or you can integrate to LDAP.
In my case, after much work, we integratged with MS AD. Had a few issues and we went back and forth because CUCM is setup in a multi-tenant and multiple domains which generated issues with the length of the username. Once we resolved that issue I found out there is another issue when you have a space in the login id and presence. Everything works with CUPC except that it does not indicate status when the user is on the phone.
Working with Cisco and it has been written up as a bug, in Call Manager, and I am waiting on the fix.
CUCM does not have to be LDAP Enabled, but CUPS does have to point to an LDAP directory to do lookups. (this is how you IM) You can simply use CUCM for authentication, but not directory because CUCM is not an LDAP directory. Not sure what rocket science at cisco left that part of CUCM, but they did. (still some Cisco Directory or whatever it's called)
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...