Cannot save individual page of a PDF in organize pages because it is certified (signing blocks)

[defaultt4axc886lv5i]

I have a pdf document and need to save the last page of the document. The document was signed via authentisign before being saved as a pdf. I purchased Adobe Acrobat for a year thinking "organize pages" is the answer, but I get the error message "The file is a certified PDF and could not be combined to generate the PDF file." Does anyone have a solution to be able to save one page when it is certified?

[Bernd Alheit]

You use the online service of Acrobat.

Can you extract the page in Adobe Acrobat Pro?

[defaultt4axc886lv5i]

I tried extracting it and got an error message too. It has something to do with the fact the document is encrypted because it's signed via authentisign. I'm just not sure how to save the single page. I tried the other method in preview of selected from sidebar in the print setting and it won't allow me to do it there either. The option is completely greyed out 

[Bernd Alheit]

Can you print in Acrobat Pro?

[try67]

Even if you could, that page will no longer be signed.

[Test Screen Name]

There should be no solution. Digital signatures are specifically designed to block editing of signed files, and if they fail to block it, the signature is lost instead. Editing, contrary to what some people want, includes page add/delete/replace. A signed file must be kept whole.