Password protected PDF files can't be used for E-Signature as the CRM system is unable to access the fields in a password protected document.

If you attempt to upload a password protected PDF file for E-Signature you may receive an error message. 

An easy way to work around the issue is to create a new copy of the PDF file.

In Adobe Acrobat open the File > Print menu, select Adobe PDF as the Printer, and click Print:

In the popup window which appears enter a name for your new PDF file, select the folder where the file will be saved, and click OK.

Note that the new file you created does not contain any form fields, so those will need to be created from scratch now. 

To create the form fields automatically, click Tools > Prepare Form in Adobe, and click the Start button:

Adobe now generates the form fields automatically based on your specific document: 

It is recommended that you review the newly created fields and add or remove fields as needed (since Adobe does not create the new fields with a 100% accuracy each time). 

Once the fields are generated you can save your changes and upload the PDF file into the CRM for E-Signature mapping. 

Note: If your PDF file does not allow printing then you will need to unlock the file in some other way. There are several online tools that provide PDF password removal services or you may request the document author to provide you with an unlocked copy.