When you have a document that you’re working on with your teammates, co-editing in Word Online comes in handy. Watch the video to see how this works in the browser on a computer, and scroll down to see how to perform this task across a variety of devices.
If the file you want to edit is yours, from either your home screen or the app launcher, choose OneDrive, and then select a Word document to open it in your browser window.
If someone shared a document with you and you want to edit that file, choose OneDrive, and then choose Shared with me. Then select document to open it in your browser window.(Our example is called Example document.docx.)
On the Edit Document menu, choose Edit in Word Online.
To see real-time co-authoring, ask one or more teammates to open the same document for editing on their devices. If your teammates are using Word 2016 or Word Online, you’ll see their changes in real time.