You want to configure caller ID to display a user name instead of a dn for internal callers. Which of the following line appearance fields should you modify in UCM? (Select the best answer.)

The Display field on a line appearance in Cisco Unified Communications Manager is specifically used to configure the caller ID name presented to internal callers. When populated, it overrides the directory number (DN) with a human-readable name such as the user's first and last name. This field is found in the Directory Number Configuration page under the Line Appearance section.

External Phone Number Mask is used to format the calling party number presented on outbound PSTN calls, not for controlling internal caller ID names.

Line Text Label configures the text displayed on the phone's line button itself, not the caller ID name transmitted to other devices.

Visual Message Waiting Indicator Policy controls how the message waiting lamp behaves and has no effect on caller ID presentation.