MSCRM - Creating a Check-Box
1. Create a new field, select the type as 'Two Options', by default you will get the values of 'Yes and No', customize them if you want. save and close the field.
2. Drag the field to the form and place it on one of the placeholders, at your own desired location.
3. Double click on the field, and the field properties window should open.
4. In field properties go to the formatting tab.
5. There you will see a 'control formatting' drop down, (by default its value will be 'Two Radio Buttons' )
from that drop down, select the 'check box'.
6. Save and Publish, you should now have a checkbox on your form.