Microsoft Adds Excel Coauthoring in Office 365 August Update

You and your colleagues can open and work on the same Excel workbook. This is called co-authoring. When you co-author, you can see each other’s changes quickly — in a matter of seconds. And with certain versions of Excel, you’ll see other people’s selections in different colors. If you’re using a version of Excel that supports co-authoring, you select Share in the upper-right corner, type email addresses, and then choose a cloud location

With the file still open in Excel, make sure that AutoSave is on in the upper-left corner. When others eventually open the file , you’ll be co-authoring together. You know you’re co-authoring if you see pictures of people in the upper-right of the Excel window. (You may also see their initials, or a “G” which stands for guest.)