Speak clearly. Don't mumble; speak too fast or too slow. You want people to understand your greeting. The way you communicate with people through your greeting is an example of how you communicate with people in the real world.
If you are on vacation/out of the office, be sure to record a special message to let people know when you left and when you are expected back.

Uploading an Audio file Select By Uploading an Audio file. Give the file a name. Optional: Leave a note for yourself to tell what the file is for. Click the musical note and browse your computer to find the correct audio file, or drag and drop an audio file onto the screen. Click Save. Click Select on the audio file you would like to use. Click Save to update the changes.
Find a quiet space to begin recording your message. Don’t be afraid to re-record if something goes amiss during the middle of your message, like if the dog starts barking or if your toddler starts calling for you. Nothing about a noisy background says that you’re a professional. Background noise is also distracting and can confuse a caller.