Enable Automatic Replies on Shared Mailbox
1. Log into the Outlook Web App at https://outlook.office365.com using your own Office 365 credentials
2. Click on your profile image (or placeholder image) on the top right
3. Choose Open another mailbox
4. Type in the name or email address of the Shared Mailbox and select it
5. Click the settings cog on the top right and then click Account
6. Make sure you are in the Account menu to the left of the pop-up window. Then click ‘Automatic replies’ on the secondary menu. Here you can switch on automatic replies, set time frames, and write internal and external automatic replies, and click OK.