To turn on instant reply for your Page:
Click Inbox at the top of your Page.
Click Automated Responses in the left column.
Click next to Instant Reply below Greet Customers to turn instant reply on.
Update the message, then click Save in the top right.
To turn off an instant reply:
Click Inbox at the top of your Page.
Click Automated Responses in the left column.
Click next to Instant Reply below Greet Customers to turn instant reply off.
