Some older courses in Blackboard don't always show adaptive release, to add the adaptive release options to your course essentially you need to "switch it off and on again".
To do this:
1. Click on the control panel in your course
2. Click on Manage Tools
3. Click on Tool Availability
4. Uncheck the box labeled "adaptive release"
5. Click Submit
6. Click OK
7. Click on Tool Availability
8. Click on the box labelled "adaptive release"
9. Click Submit
10. Click OK