We're running IBM Notes 9.01 as mail client under Windows 10. While migrating to Office 2016 a strange problem appears:
All Office applications can send the currently open file as a mail attachment (File -> Share -> E-Mail (as attachment, as PDF, as XPS, just as Link is greyed out)).
Only PowerPoint can't: when clicking the same menu in PowerPoint a single button "as link" is visible and it is greyed out. The other 3 options are just not there.
Notes works fine, it is the default mail client under Windows 10 1709. I.e. clicking a mailto: link opens Notes.
BTW, Win 7 - Office 2010 - Notes 8.5 no problem, PowerPoint displays all options