How to Add Automatic Replies to a Shared Mailbox in Office 365
Log into Outlook on Office 365 http://o365.ccsnh.edu with your CCSNH account (the account must have access to the shared mailbox).
Click on your profile picture at the top right and click Open another mailbox.
Enter the name of the shared mailbox and click Open.
After the shared mailbox opens click the settings icon at the top right and click View all Outlook settings.
From settings, choose Mail, Automatic Replies and click Turn on automatic replies.