If an Entity has never been enrolled in a Program before, you will need to go to the Site where the Entity is currently enrolled.
On the Navigation Bar, select "Entities" > "View/Edit Entity" and search for the Entity name.
Click to edit the Entity and go to the "Program Assignment" tab.
You can then select the Site from the drop-down menu, where you would like the Entity to be enrolled.
Check off the Programs in which the Entity should be enrolled.
If you are trying to re-enroll an Entity into a Program that it has already been dismissed from, you will need to re-enroll them through "Enroll Entity" on the Navigation Bar.
You will then search for the Entity you wish to re-enroll.
Select the Entity and click submit.