Office 365 Business and Education users now have the ability to chat in real-time alongside any Office 365 document they are working on.
The chat feature is available when users are working in Office Online on documents stored in either OneDrive for Business or SharePoint Online. And the feature is available for all Office documents, including Excel, OneNote, PowerPoint, and Word.
To start a chat when you are sharing a document and editing it collectively, click the Chat button in the upper top right of the document. From there a chat panel will pop out with where you can converse with your co-authors and even user emojis as you work together.
This chat feature was recently introduced to the regular consumer version of OneDrive and Office Online. But when chat launched then it also brought with it the ability to have voice and Skype calls with your co-editors via Skype. Today's announcement by the Office Team, mentions that chat function is built on the same tech as Skype for Business, but there is no mention of voice or video calls for Office 365 Business and Education within Office Online documents.