Practice makes perfect when it comes to mastering confidence in your voice, so practice on a friend, colleague, or family member to make sure when it’s time do it in real life it feels like second nature.
Friends and colleagues speak to each using first names only. So do people of authority. They do not call each other and leave voicemail messages asking for Mister, Miss, or Mrs. Therefore, when you call a person you want to do business with and you leave a voicemail message, refer to them by their first name only. Don't say mister, miss, or misses. Don't say their last name. Begin your voicemail message by saying only "hi/hello" followed by the person's first name. Or, you can even forget the "hi/hello" and just say the person's first name. That is how you show confidence and authority and separate yourself from weak salespeople.

A badly-done greeting, on the other hand, can confuse and infuriate customers over the phone. Creating a professional-sounding voice recording for your phone system can be a more difficult process than one initially might assume. To create a professional business voicemail greeting, businesses need to do several things:
How do I record my Voicemail Greeting over the Phone? Dial the Voicemail Access extension 899 (default) Enter password followed by #. Press 0 for Mailbox Options. See Also How do I record personal greetings for Voicemail Options.