Go to Settings -> Click the Bookings tab
Scroll down to Booking Confirmations or Booking Reminders
Turn on the iCal toggle -> This will add a 1 credit tag to your message
Click Save
How to add an iCal link to your booking confirmations so your clients can add their appointments to their device's calendar
Go to Settings -> Click the Bookings tab
Scroll down to Booking Confirmations or Booking Reminders
Turn on the iCal toggle -> This will add a 1 credit tag to your message
Click Save