Microsoft is calling this feature “real-time editing” but at the time of the
initial Office 2016 launch, it is not quite as “real-time” as you might expect.
While it is still useful, it’s helpful to know what you can expect.
To try it, select Edit Document > Edit in
Word Online on shared documents. Word
Online edits show up in the desktop and
tablet version of Word, as well. Wherever
the changes have been made, a small
pop-up alert box appears, allowing you to
sync and then incorporate any changes
from the Online version of Word—to your
desktop version of Word.