Arguably the most intimidating factor when leaving a voice mail is the fact that once you leave the message, "in one take," there is no taking it back. That is why, especially in the business world, an overwhelming amount of people revert to email rather than leaving a voice mail message. Especially in a technologically advanced world, email or text messages are now used as a primary form of communication. Although there is a good argument behind opting for the written word over the spoken one, an email can lack the human touch, the emotion and enthusiasm in a voice, that can often times generate a better response. In fact, there is no impact that compares to delivering a clear, concise, professional message through your own unique human voice.
If you are using a IP 400 series desk phone, press the Voicemail function key. If you are using a Cisco 7900 series desk phone, press the "Messages" button (envelope icon). If you are calling from a phone other than your own desk phone, dial your own phone number and press the * key when you hear the voicemail greeting.

Creating a professional voicemail greeting isn’t complicated, but you need to keep a few things in mind to ensure success. The following tips will help: Be friendly and welcoming - let your company's personality shine!; Have a clear voice, speak at a slow to moderate pace, minimize background noise; Ensure the greeting is human and approachable; Keep the greeting short and informative; Ensure the greeting doesn’t sound robotic or unnatural; Show your gratitude for the call by saying thank you; Manage expectations by clearly stating when the client can expect a callback.
The bad news is that, if you are a millennial, you cannot afford to regard leaving voicemail messages as obsolete. There are four generations actively participating in the workplace. This is unprecedented. It means that, while Baby Boomers are learning to text, millennials also must become adept at using voicemail.