Before you set up an out of office or automatic reply in Outlook, you'll need to know your Outlook account type. The steps you'll follow will depend on whether you have a Microsoft Exchange Outlook email account (if you have email through an organization, such as the place where you work) or an IMAP or POP3 account (if you have an individual email account such as Yahoo or Gmail).
To see which type of Outlook email account you have, open Outlook, and in the menu bar select Tools > Accounts. Then, on the left pane of the Accounts box, select the email account.
If you're using a Microsoft Exchange account, go to Send automatic Out of Office replies from Outlook for Mac and follow the steps under “View this if you have an Exchange or Outlook.com account.”
If you're using an IMAP or POP3 account, such as a Yahoo or Google Gmail account, go to Send automatic Out of Office replies from Outlook for Mac and follow the steps under “View this if you have a Hotmail, Gmail, Yahoo! or other POP or IMAP account.”