Courses under development are set to unavailable to prevent students from accessing them before you are ready for enrollment. This tutorial shows you how to make your course available to students by changing the course properties.

Learn more: https://help.blackboard.com/Learn/Ins...

Transcript:
Students cannot access your course until you make it available. You can keep your course unavailable while you are building it, and make it available when you are ready. Let’s take a look.
The red lock icon in the top right of the page indicates that your course is unavailable to students. You can select this icon to make your course available, or to set other options related to course availability, select Properties under Customization in the Control Panel.
Here, you can edit the course description, make the course available, and set the course duration.
When you are finished, select Submit. A confirmation message tells you the course properties were successfully updated.