We don't recover an Owner Open the PDF in Acrobat. For strongly encrypted files, enter your password when prompted. If the document has a Document Open password, click “OK” to remove it from the document. Of course, you can also provide a link Remove security from password protected PDF files Choose Tools › Encrypt › Remove SecurityIf the document has a Document Open password, click OK to remove itIf the document has a permissions password, type the correct password in the Enter Password box and