A professional voicemail greeting is essential in many aspects of a business. In sales, it enables you to properly respond to inquiries from prospects and customers or discuss a deal in more detail. When they call, and you can’t answer, you may lose the opportunity for immediate communication and potentially lose a client or customer.
Start Skype and choose Tools→Options→Calls→Voicemail from the main menu.Put a checkmark in front of Send unanswered calls to voicemail.Just click the Record button (the green button with the triangle) and speak the Voicemail greeting you want callers to hear.Click the Stop button (the red button with the dot) when you're finished recording.Click the Replay button (the red button with the backward arrow) to listen to the message you just recorded.When you're satisfied that you recorded the perfect message, click Save.See More....

Telephone voicemail messages influence your callers’ impression of your entire organization. In most cases, the first contact and first voice any caller to your company will hear is the voice on your telephone messages. You want to ensure that this voice projects a professional business image for your organization.
Before you record a professional voicemail greeting, you may want to consider the type of people who might call your home or business. That way, you can think about the information these callers might need before you compose your greeting. Most callers are familiar with how to leave a voice message, so try to avoid giving them instructions. Some things you may want to include in your greeting might be your full name, title, name of your company, and an alternate method of reaching you. If you plan to be unavailable for some time, it can be a good idea to tell your callers when you will return and give them the name and phone number of another individual to call in the event they need immediate assistance. A private voicemail box enables a person to receive telephone messages when the phone cannot be answered.