I need to add a digital signature to a PDF file using Adobe Acrobat Pro XI.
Please assist me with the process.
We apologize for the delayed response and inconvenience caused. As per the description above, you want to add a digital signature to a PDF file using Acrobat Pro 11, Is that correct?
Please refer to the following KB docs which discuss how to sign a PDF file using Acrobat Pro 11 Certificate-based signatures in Adobe Acrobat XI Link: https://helpx.adobe.com/acrobat/11/using/certificate-based-signatures.html
You can also refer to Signing PDFs Link: https://helpx.adobe.com/acrobat/11/using/signing-pdfs.html
Feel free to update this discussion for any further assistance.