1. To set up a voicemail and enable it for an extension, navigate to the Settings section:

2. Then to the Extensions section:

3. Click on the  next to the desired extension to edit it:

4. Navigate to the Voice Mail section and enable the option:

5. Next, fill in your details and click Save (you can skip this part if you do not wish to receive e-mails):

6. To connect an extensions voice mail and use it to a Queue, navigate to the Queues section and click on  next to the desired queue:

7. Navigate to the Destination when no pickup option:

8. Select Voice Mail and then select the extension you'd like to use:

9. Finally click Save to apply the configuration: