You can make a return call to someone who has left you a voicemail message.

To make a return call from voicemail:

1. Using the messagesHead Messages gadget on the Main tab, locate the message from the person that you want to callback.
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2. Click on the name or number details of the caller to make a return call.

The progress of the call is displayed on a tab in the callsHead Calls gadget. If the call fails, the gadget displays a reason for the failure if known.

When calling an internal user, if they do not answer you can set a ringback to call you when they end their current or next call.