Viewing preflight results, objects, and resources. PDF/X-, PDF/A-, and PDF/E-compliant files. Playing video, audio, and multimedia formats in PDFs. Add audio, video, and interactive objects to PDFs. Edit document structure with the Content and Tags panels. Reading PDFs with reflow and accessibility features. Capture your signature on mobile and use it everywhere. Overview of security in Acrobat and PDFs. Securing PDFs with Adobe Experience Manager. Convert or export PDFs to other file formats. Hosting shared reviews on SharePoint or Office 365 sites. Working with component files in a PDF Portfolio. Add headers, footers, and Bates numbering to PDFs. Send PDF forms to recipients using email or an internal server. Troubleshoot scanner issues when scanning using Acrobat. Change the default font for adding text. Enhance document photos captured using a mobile camera. Rotate, move, delete, and renumber PDF pages. Asian, Cyrillic, and right-to-left text in PDFs. Grids, guides, and measurements in PDFs. Access Acrobat from desktop, mobile, web. Visma Addo supports all applicable requirements within PaDES, eIDAS and local rules for signatures with eID and simpler signature forms. If you have followed the guide above and it is still not possible to validate the signature, this is because you are using a signature solution that does not meet all requirements for offering a digital signature. If it doesn't work, making the certificate a trusted identity Next, press " OK" again to close down the certificate settings and you can press "Validate all" in the Signature panel. Tick " Use this certificate as a trusted root" then press " OK". Click " Add to Trusted Certificates." and when Adobe asks if you are sure, click "ok"Īnother pop-up will appear where it is possible to mark that this certificate is trusted. Select the " Trust" tab in the "Certificate Viewer" window, where you can now see that the certificate is not trusted. In the next window, you have the option to add the certificate to Adobe Reader's list of trusted certificates - that is, if this is a valid certificate. 
Press "Show Signer's Certificate." after which you can see information about the certificate.
When you have pressed "Show signature Properties." a pop-up will appear, in the pop-up you must access the signing certificate Right-click with your mouse on the signature that reports an error.Tap on "Signature Panel" if it is not already open.If the error "At least one signature has problems" is still visible, it requires us to go into the settings for a signature, by browsing the certificate. however, I would recommend that you take a look here, to see what you can so in the future If the signatures are successfully validated, Adobe Reader displays that the documents are signed and all signatures are valid.
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