(from FAQ Page)
How do I set my out-of-office greeting?
From on-campus, simply access your voicemail and press 3 (phone manager functions) then press 6 (record out of office greeting).
From off-campus call 609-771-2222. When the announcer starts talking, immediately press the # key. If she completes her announcement before you press #, you need to hang-up and try again. Once you successfully press #, you will be prompted for your extension and then your voicemail password (press # after you enter your password, but not after you enter your extension). Once you’ve accessed the voicemail system menu, press 3 (phone manager functions) then press 6 (record out of office greeting).
To disable your out-of-office greeting use the instructions above to access your voicemail again. It will notify you that you have an out-of-office message set. Press 4 to disable it or press 5 to keep it active.