A business voicemail greeting is more important than you think it is. While many users pine away at intuitive user menus and expansive feature sets, many forget the importance of their recorded voicemail message. While this may not sound like a travesty, it could very well could be.
If the mailbox is NOT setup, the fixed system message, "I'm sorry, the person you're trying to reach is unavailable at this time" plays instead of the personal greeting and the mailbox number plays instead of the mailbox name.

The above section details types of phrasing to avoid; however, it doesn’t detail what users should NOT say on their greeting. Though this is a bit loaded, as there are hundreds of combinations of things one shouldn’t say, there are some key components users should ALWAYS avoid. a. Forget About Slang: You should strive to be as professional and welcoming as possible in your greeting. While this may steer you towards using slang, in an attempt to make callers comfortable, it’ll most likely work against you. As a professional, your demeanor, tone, and speech should be clear cut and well articulated. Using slang undercuts this and works against you. b. Don’t Even Think About Profanity: This is a no-brainer. Never, under any circumstances, curse in your greeting EVER! c. Keep Your Sentences Clean, Don’t Ramble: Introduce yourself and give your caller specific direction. Avoid long diatribes detailing tangent thoughts. Keep it simple and quick. d. Always Return Your Calls: It’s important for callers to feel they are valued. Nothing dissolves this quicker than a greeting that doesn’t stress this. For example, “I’ll call you when I can,” “If I don’t return your call, please call back”—these phrases are terrible and completely destroy any good will you may have with a caller.
You can set up new voice mailboxes before or after the migration, and after the migration, you can set up mailboxes by dialing “*298” from your desk phone, entering the default PIN “COXCOM” (269266), and following the prompts.