You’ve been able to co-author Word, Excel or PowerPoint documents for over a year now. But now you don’t even have to leave Microsoft Teams. When you share Office 365 files with your co-workers while in a Teams channel, it automatically enables co-authoring. And external guests invited to your Team session can also participate in the editing.
If your co-worker creates a bad edit and saves the document while you’re away, you can always rely upon Version History. Files that reside in your Teams document library under the Files tab have an ellipse menu (…) to the right that provides the option to ‘Open in SharePoint’. Once in the SharePoint library, your file will show another vertically aligned ellipse to its right. By clicking on it, the Version History item appears in the menu where you can choose any previous version of that file.