You may have booking sources set to compulsory on your booking cart for online bookings, but you can set it to also be compulsory when you add admin bookings to ensure this information is not missed.
1. Go to Admin > General details.
2. Scroll down to "Admin booking form options" and set Require source value to "Yes".
3. To do the same for admin enquiries, scroll down to "Admin enquiry form options" and set Require source value to "Yes".
4. Click Save.
If you click to save an admin booking now you will be prompted to complete this field before you can save the booking:
