Retrieving voicemail messages. Users can listen to voicemail messages by accessing Nextiva Voice mailbox from a Nextiva phone or external phone. If calling from the primary phone, dial *86, otherwise if calling from any external phone, dial the phone number and press the * key during the voicemail greeting.
For the users to be able to do this from the phone or by calling into the system the users will have to have pre-recorded greeting for different status and switch between them from the phone or by calling in to the system. They can do that from the web client, windows client or an android client.

After my custom message has played, the automatic voice kicks back in giving instructions on how to leave a message & access additional options before the tone is sounded. How can I eliminate those automated instructions and proceed directly to the “beep?”
In the Voicemail section, tap Voicemail greeting. Tap Record a greeting. Tap Record . Record your greeting and when you’re done, tap Stop . Choose what you want to do with the recording: To listen to the recording, tap Play . To replace the recording, tap Redo. To save the recording, tap Save. Enter a name for the new greeting and tap Save.