From the Skype for Business desktop app (if you are running Click-2-Run build C2R 8201.1002 or later), select Set Up Voice Mail. Change your Call Answering Rules You can change what options your callers have when they reach the voicemail service; get disconnected, hear your greeting, record a message, choose to be transferred to the number or user you select. Change your prompt language This is the prompt language that is played to callers. For list of supported languages, see Languages for voicemail greetings and messages from Skype for Business. Configure your Out of Office greeting This is the customized greeting message that is played to callers when your status is Out of Office. This option can be activated "Always," when you have an active "Auto Reply" in Outlook, or whenever you have an out-of-office calendar appointment.  Where you can get your voicemail messages from
These work voicemail greetings are for the work phone that you and only you use. They’re highly effective because they help you establish a relationship straight from the voicemail. Or they help you share an important update in a simple, straightforward way.

31. Hello, you’ve reached [your name]. I’ll be out of the office from [start date] to [end date]. Please leave a message and I’ll return your call upon my return. Alternatively, you can email me at [email address] or call [name] at [phone number] for immediate assistance. Thanks for calling!
Creating a voicemail greeting might not be fun, but with the scripts I’ve shared, you should have an easier time. No need to practice time and time again — simply plug in your name, company title, and other details, then read it out loud to your phone’s voicemail greeting recorder. With a professional greeting, you’ll continue nurturing prospects even if you don’t pick up the phone.