serial validation error acrobat standard/pro XI

I am upgrading my enterprise to Acrobat Standard/Pro 11.0 XI. I used the customization tool XI to create mst to deploy to the enterprise. we are upgrading from 9.x and 10.x to 11.0. I can deploy and it installs correctly. However upon launch it prompts immediately for serial key. I verified serial key is exactly the same as what's on out LMS corporate site. If I manually enter the serial key I get the same result. I have searched for corresponding documentation and read the admin guide online to no avail for solution. next steps? open a case or is it a simple fix?

Regards.