Hi @btk,
I can confirm what @james_whalley said. I'm a Canvas admin, and I have a couple redirect tools setup at an account/subaccount level so all courses in the account/subaccount have the specific redirect link there.
I did just want to confirm that your link goes to an external site, and not somewhere within your Canvas course, correct? I only ask this because using the redirect tool to create links to areas inside your Canvas course is not something that will work for multiple courses without some careful advanced manipulation. This came up at InstructureCon this year, so it's fresh in my mind as something to ask about. The redirect tool is mainly intended to link to external sites, though I know it's been used for other creating purposes as well.
-Chris