Add an Out of Office Message to a Shared Mailbox
Browse to office365.ncl.ac.uk and log in with your standard university email account.
Go to the top right and click on your profile picture (or your initials if you don’t have a picture).
Inside this menu, choose "Open another Mailbox"
Enter the display name of your shared mailbox. This should give you an autocomplete option for the mailbox.
Once you have this mailbox open, go to the settings cog in the top right.
Choose “View all Outlook settings”.
On this page, go to automatic replies and then “turn on automatic replies”.
Type your message and set the start and end times if required. Click “save” and this will be applied.