The issue is applicable to Acrobat DC and Acrobat 2015 October release.
PDFMaker does not work with Outlook 2007. Convert to Adobe PDF option hangs while converting an email to PDF.
The problem is fixed in the November 03, 2016 patch release of Acrobat DC. This update is automatically applied to all existing installations of Acrobat DC. You can also open Acrobat or Reader DC and go to Help > Check for updates to make sure you are on the latest patch.
Details about the release: Release notes | Adobe Acrobat DC, Acrobat Reader DC | Update, November 03, 2016