One of those "gotchas" we get a lot is why the dial-by-name directory doesn't show up with all of the people on the phone system.
Answer: If you don't record your "directory name" or what is called the self-identification recording on each extension then you won't like the results.
How do you do that?
To record your self-identification message:
Go to your voicemail menu (Default 999).
Enter your voicemail PIN number.
Go to the options menu (‘9’ key).
Press ‘5’ key to record the self ID message.
Record your name only, i.e. “Sarah Jones”.
It's a worth while tip since it comes up more often then you would think. Oh, and by the way, the dial-by-name feature only works by last name not first name and there is no way to change that.