You can contact Adobe support and get your product registered on call.
also , you can register the product online, log in on adobe.com and register the product
No, I'm on a bulk license, so you can't use the online registration, and I spent the morning on the phone with support who could neither help me or give me the information I need.
djarum69 it sounds like you have a volume license. The install files are the same for volume license and retail customers which is why it is prompting you to register. You should be able to look up your product at https://licensing.adobe.com/. If you are unable to login then you will want to work with your I.T. department or purchasing department as one of them should have access. This is the same site which was used to obtain the software and your serial number.
For volume license customers the serial number is registered when the software was purchased.