MYounger.
You will require the admin password to access the voice mail programming. If you don't know it or it has been lost, please contact a qualified installer in your area to have it reset. Passwords are not divulged in this forum.
Once you gave gained access to the admin mailbox. you can change the displayed name:
Press MBOX > ChNG > Enter the mailbox number >Press OK > if you need to reset the mailbox password press RESET > Press OK until the name is displayed and then using the keypad spell the new name (LAST,FIRST).
To chane the greeting: Log into the mailbox > Press ADMIN > 1 to change the spoken name > GREET to change the actual greeting. Again a password is required.
Again please contact a qualified installer in your area if you are having difficulting.