The out-of-office message you leave should be well-written and well-thought-out. It should contain the date and time when you're out of the office, the reasons for your absence, and any other pertinent information. The message should be professional and should include a social link, if applicable. This will allow your customers to contact you. You should leave a short but informative out-of-office message that will let them know that you're out of the office.