how to OCR a password protected PDF file?

I’ve imported a password protected PDF file. When I try to convert it into a searchable document DTPO messages to be unable to determine the page count and asks whether it is an appropriate type of data.

What can I do to make the file searchable?

Thanks in advance for your support!

Kind regards, Friedrich

If the file is printable after unlocking, then you could try to print the PDF document into a new PDF document and OCR the result.