How to set automatic reply in Outlook

Step 1: Go to the File tab on the top left corner of the ribbon.



Step 2: In the Info section, under Account Information, select the account you want to use and look at the options below.
For this guide we will use Microsoft Exchange account.



Step 3: click the Automatic Replies (Out of Office) button.



Step 4: In the dialog window that appears, select Send automatic replies.
(You can define a date range to deactivate auto replies when the specified end date is reached.
If you don’t set a date range, you’ll need to turn them off manually when you return.)
On the Inside My Organization tab, enter the message you want your coworkers to receive while you are away.

Step 5: On the Outside My Organization tab, write the message you want to send to external contacts.
Be careful when choosing to auto reply to Anyone outside my organization,
as this will send your “away message” to every incoming email, including advertisements, newsletters, and junk email.
To prevent this, it’s advisable to choose My contacts only.

Then Click OK to save your settings.

Credit : https://www.ablebits.com/office-addins-blog/out-of-office-message-outlook/