To set up your voicemail, press #55 or *68 from your home phone or call the retrieval number you received with your welcome letter. Voice prompts will guide you through the rest of the steps.
The bottom line is that a business’s situation is likely to change often and rapidly, each of which need a unique and applicable voicemail greeting to cover the circumstances and timeline. For example, callers shouldn’t reach a business-as-usual voicemail, and therefore expect a return call within the business day, if the subject they’re calling is out on vacation for two weeks. Such a lack of communication is a recipe to lose that caller’s trust and tarnish the brand’s reputation.

iPhone users have another option: You can send a voice message from Apple's Messages by tapping the microphone button inside the text box (this works only when you're messaging other iPhones). By default, these voice messages last for only two minutes before they are deleted, but you can change that. Either tap Keep under any sent voice message or go to Settings > Messages and tap Expire under Audio Messages. You can set the expiration date to Never, but this affects only your record of the conversation, not the recipient's.
36. Hello. You’ve reached the office of [your name] at [your company]. I will be out of the office from [date] to [date]. Please leave your contact information with a brief message, and I will call you back as soon as I have the chance. If you need to speak with someone urgently, please contact [name of colleague] at [email or phone number]. Thanks for calling.