Phone method:
Press the Voicemail/Message button on the phone that has a voicemail waiting OR dial *98.
From another office phone:
Dial *97, enter the Voicemail box # and then enter the PIN when prompted.
From an external phone:
Dial the desired phone number/user, when the greeting starts playing press *, and then enter the PIN when prompted.
Audian User Portal method:
See Article: Audian User Portal - Voicemail & Transcription