Adobe PDF iFilter Search No Longer Works After Upgrade to DNN 7.3

After upgrading your DNN site to DNN 7.3 or above Adobe PDF iFilter search no longer works.
Calling LoadLibraryEx on ISAPI filter "C:\Program Files (x86)\Parallels\Plesk\isapi\urlprotect.dll" failed
urlprotect error
DNN 7.3 requires 32-bit ISAPI filters to be disabled.
If you are in our shared hosting environment, please contact support for assistance. If you are a dedicated server customer follow the steps below.
  1. Log into your server using Remote Desktop.
  2. Press the Windows key and type IIS to open IIS Manager.
  3. Expand the server, expand Sites.
  4. Click on the site that is not longer able to use iFilter.
  5. Double click on ISAPI Filters.
  6. Locate the urlprotect filter that was added by Plesk (located in C:\Program Files (x86)\Parallels\Plesk\isapi\urlprotect.dll) click on it and click Remove.

    Remove URLProtect Filter
  7. This setting change should allow your site to search your PDF files.

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