Alter Produktkey von Adobe Acrobat 11

Hello Sandra!

I hope you are doing well, and we apologize for the delayed response.

As our Product Community expert correctly pointed out, Acrobat 11 is now an end-of-support product, with support ending on October 15, 2017. For more details, please refer to this article: Adobe Acrobat XI End of Support.

Adobe strongly recommends that you update to the latest versions of Adobe Acrobat and Adobe Acrobat Reader. By updating installations to the latest versions, you benefit from the latest functional enhancements and improved security measures.

Thanks,

Anand Sri.

Not really. Even if it worked, you won't be able to activate the application, since Adobe discontinued the activation servers for older versions of their software.