How do I change the nightline message on nortel meridian

SOURCE: change voice message on nortel meridian phone system

You need to go in to voice mail admin .
Feature 983 1020000
press AA
press Greeting
press greeting again
enter 1 for greeting 1
this should be your main greeting it could any greeting from 1- 20 , it depends on how it was set up but that should work fine .

SOURCE: T7316e Nortel Meridian Norstar Telephone

Feature *1, Press the desired key, dial the #