Preparing for several annual meetings come this february and march, having hundreds of files in several folders, drag to link in OneNote is a much missed option by me too after upgrading from Office 2010 to Office 365 Small
Business Premium.
There is a workaround I figured out. It's fairly simple, but does not excuse the removal of this important, basic feature. It's considerably faster than manually linking, and it doesn't require the installation of any add ins which might be problematic
for users with draconian IT departments (is that a redundant expression?).
1. Open your web browser.
2. In the address bar, navigate to the folder path with the load of files you want to link. The browser should display a list consisting all the files in the directory. The listed files are links to the same.
3. From there, select the links you want, then copy/paste them into the onenote page. It will create a table automatically, which you can modify/destroy/whatever
And done. Regardless, a return to this as an option for a simple drag and drop operation would be quite welcome. I'd still love to know why they removed this feature.