Unable to Activate Adobe FrameMaker 10 on Windows 11 – Serial Number Not Valid

Hello Adobe Community,

We are facing an issue activating our valid and purchased copy of Adobe FrameMaker 10 on a Windows 11 machine.

When we enter the serial number, we receive the error:
"This serial number is not valid for this product."

We have confirmed that the same serial number works without issues on a Windows 10 machine, which leads us to believe the problem may be related to retired activation servers or compatibility with Windows 11.

Adobe Support confirmed that:

"Activation servers are retired for certain older licenses, so this cannot be activated anymore."

We are trying to:

• Continue using our licensed software legally

• Explore any offline activation methods, workarounds, or alternate installers

• Understand if it’s possible to transfer activation from the working Windows 10 machine

• Get guidance from anyone who has dealt with a similar situation

Any advice or suggestions from the community would be greatly appreciated.

Thanks in advance!