On the Phone tab, click the voicemail icon below the dial pad, and then click Change Greetings. Skype for Business calls your voicemail and guides you to record a personal greeting.
Here are some helpful links to help you record voicemail greeting that is clear and professional. Record your phrases for recording a great voicemail greeting here. Record yourself and compare it with a native speaker. Hear Georgie giving helpful feedback to other students on their voicemail greetings.

Do you speak a second language and serve customers in an area that primarily uses a language other than English? Make it known that you speak both languages. Start the voicemail with the most dominant language spoken in your market followed by the same message spoken in the secondary language:
When you create a professional voicemail greeting, it can be a good idea to think about what your callers might want to know. After doing so, you can make a list of points to cover in your voice message; it might also be a good idea to write out the entire greeting on a piece of paper. The ideal message should be somewhere between 10 and 20 seconds, so you may want to time yourself repeating your message before you record it. After composing your telephone message, it can be a good idea to get a second opinion of this greeting so you can make sure it sounds professional. Writing down a voicemail greeting helps prevent mistakes when recording it.