The co-authoring functionality in Office now makes it possible for multiple users to work productively on the same document without intruding on one another's work or locking each other out.
You can use this new co-authoring functionality in PowerPoint, Word, and OneNote documents on SharePoint Server and OneDrive. New co-authoring functionality is also supported in Excel for the web and OneNote for the web. To learn more about collaboration features in Word, see Collaborate on Word documents with real-time co-authoring
When you work on a file that's stored on a supported server, selecting File >Â Save does the following:
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Saves any changes you have made to the file on the server
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Updates (refreshes) the file you're viewing with any changes made by other authors
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Stores the previous version
To compare the properties of the current version of the document, select File > Info. You can use the Compare feature on the Review tab to compare versions of a document or to combine revisions from multiple authors.
