Microsoft has released a fresh new build for Office Insiders who are configured to receive updates from the Current Channel (preview) of the Office Insider Program.
Version 2008 (Build 13127.20164) is rolling out and finally picks up support for modern commenting in Word.
For those who are not aware, with modern comments, Microsoft Word users can add comments to objects, @mention colleagues, and resolve comment threads for a better collaboration experience.
We have already covered modern commenting in details here
For Outlook, this update will you to delete messages and conversations in CML view.
Source: MS Office Insiders
 - Version 2008 (Build 13127.20164) brings modern commenting in Word; Changelog){kind=link}