*IMPORTANT* In order to set your greeting, the phone extension MUST be assigned to you by submitting a Voicemail PIN reset Service Request (Sign-in Required).
Login to the VM System by clicking on the button with the envelope picture on your phone panel:
If you have one of the newer phones you will be looking for this button:
Next, listen to the phone prompts carefully, select the following options in the following order:
Personal Options #6
Change Greeting #2
Record Your Name #3