Set Your Non Keyword Response For Office Hours Only or 24/7

It's easy to set an auto response that will send during non business hours or all the time.

Go to Settings and scroll down to the section that says "Away Message Incoming SMS Auto-Response"

Select the "On" button and then select "24/7" if you want this feature on all the time or "Send Message ONLY Outside of Office Hours" if you want the repy to send when you're not in the office.  If you select this option enter the office hours (this would be for your time zone).

Finally, add the message that you want to appear when you're out of the office in the box labeled Auto-Response and scroll down to the bottom of the page and hit "save".