Please follow the below steps to set-up the automated replies:
1. Select View settings in new Outlook.
2. Select Accounts > Automatic Replies.
3. Select the Turn on automatic replies toggle.
4. Select Send replies only during a time period, and then enter start and end times.
5. Under Send automatic replies inside your organization, enter the message to send while you're away. (You can use the formatting options for text alignment, color, and emphasis.)
(To set up automatic replies to other people, select Send replies outside your organization, then add a separate message for that audience.)
Please let us know if you need any further assistance.
