How can I resolve a "genuine software verification failure" during installation from DVD?

I have a set of 3 DVDs from my organization that has volume-licensed Adobe CS6 Production Premium.

I need to install it on a laptop that has no DVD drive.

I can mount the ISO image of the first DVD disk as a network drive, and can then proceed through installation. When I am asked to "insert the second disk", I mount the second ISO image, and installation proceeds. In the process, I enter the serial number / key provided by our IT department and sign in with my Adobe ID.

When installation finishes, however, I am informed there was an Adobe genuine software verification failure. The customer support link leads to this forum.

How can I resolve this, please?

I have searched the forums for related issues and can only find reports of similar problems for downloaded software. The advice there is to re-download the software. Should I expect my volume-license key to work for the downloaded software?

Best regards,

D Kreil