This tutorial will show you how to create an Autoresponder / Auto-reply / Out of Office reply.
Step 1: Go into Settings from the More dropdown menu.
Step 2: Click on Autoresponder in the left menu.
Step 3: Create Autoresponder Message
A) Enter a subject
B) Compose the message in the Response to Send to Domain Users box
Step 4: Copy the text from the top Response to Send to Domain Users box and paste it into the bottom Response to Send to Everyone Else box.
Step 5: Autoresponder Options
Click the toggle for Enable Autoresponder to turn it ON
Click the toggle for Disable responses to indirect mail (prevents responding to spam) to turn it ON
Set a start date and time, then end date and time
Step 6: Click Save