How can I check all my course links in a course to make sure they are still valid?
After you create content and link to files stored in Course Files, you can verify that links are still valid with the link checker tool. For example, if you delete a linked file from Course Files and run the tool, you are informed of a broken link.
You can run this tool on a regular basis to check the validity of your links in your course content. After you copy, restore, or import a course, you can run the tool to be sure everything is linked as you expect. Users with access to items in Course Files can move and delete items, or edit the permissions on an item. These actions may impact the validity of linked items in your course.
For more information the link checker tool, please visit: https://help.blackboard.com/Learn/Instructor/Course_Content/Reuse_Content/Check_Course_Links#check-the-links_OTP-2