- Check if the service is part of a third-party vendor or if it is inside Microsoft Classroom.
- Check if the link works, and if not, try to copy and paste it to see if it works on a different website.
- Check if the privacy settings are correct and that the link has not been blocked.
- Make sure you are logged in to the Microsoft Classroom account before trying to add a link.
- If all else fails, contact Microsoft customer care for more suggestions.