In order to remove or unlock a password, it is necessary to have the permission to do so. If you don’t have it, you should locate a policy author or administrator of the password protected PDF to make it happen. If you have the right permissions, follow these steps to remove the passwords:
Step 1
Open the PDF in Adobe Acrobat Pro on Windows or Mac.
Step 2
Choose tools > encrypt > remove security
Step 3
If the document has a Document Open password, click OK to remove it.
Step 4
If the document has a permissions password, type the correct answer and then click OK.
Step 5
Be sure to save the documents so others can access them as well.
Note:
Avoid using PDF password remover tools as they often fail to unlock PDFs and potentially create larger security risks.