Note: Sending replies outside your organization will send your automatic reply to every email you receive, including newsletters, advertisements, and potentially, junk email. If you want to send automatic replies to those outside your organization, we recommend sending replies only within your organization. Outlook for Windows PC On the View tab, select View Settings in new Outlook Select Accounts > Automatic Replies Select the Turn on automatic replies toggle Select Send replies only during a time period, and then enter start and end times Under Send automatic replies inside your organization, enter the message to send while you're away When you're done, select Save Outlook for Mac In the navigation pane, select Mail. Select the Tools menu, then select Automatic Replies. Select Send automatic replies for account "(your account)". Under Reply once to each sender within my organization, enter your automatic reply. To set the start and end dates, select the Send replies during this time period checkbox, and enter the start and end dates and times. Select OK. Outlook for Web At the top of the page, select > Mail > Automatic replies in Outlook on the web or Outlook.com. Select the Turn on automatic replies toggle. Select the Send replies only during a time period check box, and then enter a start and end time. In the box at the bottom of the window, type a message to send to people during the time you're away. When you're done, select Save.