The following permissions:
- To receive voicemails: Voicemail > Voicemail > Receive
- To add a voicemail greeting: Greetings > Greeting > Add
- To delete a voicemail greeting: Greetings > Greeting > Delete
- To edit a voicemail greeting: Greetings > Greeting > Edit
- To view External Contact names in inbox: ExternalContacts > Contact > View