I have these steps for you on how to do it. Hope it helps.
While the voicemail system will play a generic greeting to caller, prompting them to leave a message, you can record your own greeting.
Press the MESSAGES
button. Depending on how your system is configured, you may be required to enter your voicemail password and then press the Done
soft key. The visual voice menu is displayed.
2.Use the up and down arrow keys to scroll to the option Greeting
2.Press the Select
soft key or OK
Use the soft keys to listen to and record your mailbox greeting.
Listen to the current greeting or the new greeting just recorded.
Record a new greeting. Note that the greeting must be at least 3 seconds long or the voicemail system will discard it.
Switch between the different sets of available soft key functions.
Submit the new recording as your mailbox greeting.
Delete your current mailbox greeting. The voicemail will use its default greeting.