Password Protected PDF doc

Hi Mary,

Could you confirm if you are getting any error messages?

To open a password-protected file, you must know the password. Try to open it with your Adobe Reader Mobile application.  With a subscription to Acrobat Reader premium (in-app purchase), Acrobat PDF Pack, Acrobat Standard DC, or Acrobat Pro DC, you can view password-protected and encrypted PDF files with support for the highest grade of PDF encryption up to AES-256.

1. Open a protected file.
2. Enter the password.
3. Tap OK.

Unfortunately, there is no way to retrieve a forgotten password.

For your reference: Opening-a-protected-file 

Let me know if this helps.

Regards,

Ria