When you first finish installing the CUCM the Call Manager use it’s own LDAP Directory of End Users which is nice to use, but in case you work in a company with more than 1000 people it’s insane to add them all. so the preferred way is to integrate CUCM with a corporate LDAP weather it was Linux, OS or Windows. in our case i will show you how to integrate CUCM with Windows Active Directory
from Windows Side all what you need is a user with Administrator Right so you will be able to access the Active Directory
now back to CUCM
first activate the service that help you to Sync Between LDAP and CUCM
Then Go to Cisco Unified CM Administration > System > LDAP > LDAP System to identify what type of LDAP
Check the Box to Enable Sync from the LDAP Server
Now Go Click on System > LDAP > LDAP Directory and click Add New
in this example the Active Directory is my Domain CCIEROOT.COM
the admin user is : firstname.lastname@example.org and i put the password for the authenticate with the LDAP
my LDAP Search Base is where i save the user it could be simple as under users. in my case i sync all the user in my domain
and my LDAP ip address is 192.168.200.1
Click on System > LDAP > LDAP Authentication. This will authenticate CUCM End Users using Active Directory instead of the embedded CUCM directory.
After performing the synchronization the users which were created in Active Directory are now appearing in the CUCM End User
Open one of the users
That is it
Note. for the users that been created on the CUCM before the Sync they will be Disabled. to Solve this issue you need to create users for them in the LDAP Directory and Sync again and they will be hilighted.