1. Ensure that the other users have appropriate permissions to access the files on OneDrive for Business
2. Cross check if the files are shared using sharing links or if it is available to be accessed from the user permission list
3. Check if the app used to access the files is compatible with the system they are using
4. Check if the file is up to date with security protocol and is not locked for editing
5. Refer to the file server logs and check for any warning or errors