An administrator is configuring LDAP for Cisco UCM with Active Directory integration. A customer has requested to use 'ipphone' instead of `telephoneNumber ' as the phone number attribute. Where…

'LDAP directory custom user fields' is not the precise term used in CUCM for mapping standard directory attributes; custom fields typically refer to user-defined extensions within CUCM.

LDAP Authentication settings are used for authenticating users against the LDAP directory, not for mapping user attributes during synchronization.

When configuring LDAP directory synchronization in Cisco UCM, the 'LDAP Directory User Fields' page allows administrators to specify which Active Directory attributes (like 'ipphone') map to Cisco UCM user fields (like 'Telephone Number'). This ensures that the correct information is synchronized from the directory service.

An LDAP custom filter is used to define which *users* or *objects* are synchronized from the directory, not which specific *attributes* of those users are mapped to CUCM fields.