Has this issue been resolved? We too are a multi-user lab environment and are experiencing the same issue. The local admin user can use Muse but all non-admin users (Active Directory) are prompted to sign in to an existing subscription or try as a trial. Therefore, our students and instructors cannot use Muse.
All of our computers are running Windows 7 64-bit Enterprise, Mac OS X 10.8.5 and 10.9.2.
Sincerely,
Noel Arendain
Computer Labs Systems Administrator
Art Center College of Design