How to Send Automatic Out of Office Replies in Outlook
From the Outlook Desktop Client
Select File and then click Automatic Replies.
In the Automatic Replies box, select Send automatic replies. Optionally, set a date
range for your automatic replies. This will turn off automatic replies at the date
and time you enter for the end time. Otherwise, you'll need to turn off automatic
replies manually.
On the Inside My Organization tab, type the response that you want to send to teammates
or colleagues while you are out of the office.
Select OK to save your settings.
From Outlook.live.com
Sign in and click the Settings Icon in the top-right area of the page. Then, click
on Automatic replies.
In the Automatic Replies box, select Send automatic replies. Optionally, set a date
range for your automatic replies. This will turn off automatic replies at the date
and time you enter for the end time. Otherwise, you'll need to turn off automatic
replies manually.
Type the reply you want sent to the people who email you while you're out and then
click OK at the top to save your settings.