I have one phone (7960) in a building of 85 phones, that does not show the corporate directory. Upon pressing the directories button it lists:
1 missed calls;
2 received calls;
3 placed calls.
All other phones at that location show the fourth option of corporate directory.
I have reset the phone both through CM and physically unplugging the wire.
The phone shows the correct TFTP settings, correct DNS, IP address, etc.
Thanks - Wendy B.