Acrobat Reader DC losing exteded features

[Patrick5FD3]

When I am downloading a dynamic pdf from our website and opening it up in Adobe Reader DC, I am unable to use a digital signature.  When I click on the signature box I get the message: "This document enabled extended features in Adobe Acrobat Reader. The document has been changed since it was created and use of extended features is no longer available. Please contact the author for the original version of this document."

However, when I open the same file in Adobe Acrobat Pro X, I find that the extended features are enabled for this pdf.

This has only recently become an issue.  We have been using the same pdf files for years without a problem.

[radzmar]

It's not Reader that has a problem, it's the PDF file. It has been Reader-enabled with a special signature, which enables additional functions in Reader for this particular PDF file. This signature is verified against a hash value of that PDF itself, that means if only one bit of the PDF got changed, the signature becomes invalid and the Reader extension is lost. 

[Andrew22213884geao]

All blah blah blah and no actual explanaiton on how to fix it

[Bernd Alheit]

Use Adobe Acrobat to sign the document. Adobe Acrobat doesn't need the reader extension.

[Test Screen Name]

"All blah blah blah and no actual explanaiton on how to fix it" 

It seems to me there was an offer from an Adobe employee to examine the file, despite being made with unsupported software, which goes beyond blah blah blah. It isn't an offer likely to be repeated now, I'd say.

[SEVP95]

To fix the issue, add the 'reader extended' features to the PDF form again. Typically, whoever created the form would need to do this. You need to have Adobe Acrobat Pro to add this feature. (see image)

[absethi]

Hi @Patrick5FD3 ,

Apoplogies for Inconvience.

Can you please share the PDF with us or a link we can download it from ?

Also can you please share the version of Acrobat you are using? Help -> About Acrobat Pro DC.

You shared that it works fine for you in Adobe Acrobat Pro X so is it so that you are shifting from Adobe Acrobat Pro X to Adobe Reader DC or has this started happening after any recent updates to Adobe Reader DC.

Please share the file with us here or by email (Email address removed by Mod: If you need to send any info to the Product team, please send a direct/private message by clicking on the profile of the user and select send the message, please avoid sharing personal info on the public platform )

Regards,

Abhinav Sethi

[Test Screen Name]

"when I open the same file in Adobe Acrobat Pro X, I find that the extended features are enabled for this pdf."

No, that is not right. Extended features apply only to the free Reader. Acrobat Pro always allows these features, and does not check for them, or give an error if they are damaged.

[Nagendra27962019k4r2]

Same problem here. But I think it is the reader problem because the same file works on my office computer, but does not open on my home computer. Maybe some environmental issue. The error says 

The file in question is https://www.canada.ca/content/dam/ircc/documents/pdf/english/kits/forms/cit0002e-2.pdf

[Nagendra27962019k4r2]

Also removing the protected mode in enhanced security did not fix the issue.