Each department and employee extension comes with a voicemail box. You'll have the option to set a email address(s) to have voicemail messages forwarded to and record or upload a greeting for the voicemail box.
A helpful note: Voicemails are left on whatever extension the caller selects. For example, if the caller presses 0 and is forwarded to 700 and 701, the voicemail is left in the extension 0 voicemail box.