A family of Microsoft word processing software products for creating web, email, and print documents.
BTW, I had this same problem in MS Word Office 365. Turns out I left the Mark Index Entry box open. When I closed it, I was able to drag and drop again. Now..
- This might be a bug, or it is possible by design. I would think it's more of a bug.
The Mark Index Entry dialog box is a modeless dialog box, just like the Find and Replace dialog. It appears that modeless dialog boxes in general do not support drag and drop in Word. I'd call that a limitation rather than a bug. However, it is worth posting feedback to Microsoft on this in the Uservoice forum at http://word.uservoice.com.