To have your Exchange account reply to new messages automatically (even when Outlook for Mac is not running):

• Select Tools | Out of Office… from the menu in Outlook for Mac.
• Make sure Send Out Of Office messages is selected.
• Enter the desired message under Reply to messages with:
  • Include when — or if — people mailing you in your absence can expect a personal answer. This might be some time after you will have returned.
• Make sure More options are visible.
• If you know when you will be unavailable:
  • Make sure I am out of the office between.
  • Enter the date and time you‘ll leave behind email under Start date:.
  • Enter the date and time you‘ll be back under End date:.
• To have Exchange send messages not only to people in your organization:
  • Make sure Send replies outside my company to: is checked.
  • Select Address Book contacts only or Anyone outside my company.
  • Enter the desired message for the out-of-office reply for senders outside your organization under Reply once to each sender outside my company with:.
    • You can leave out contact details in this message for the world, for example.
• Click OK.