More Information How to configure the Auto-Recover settings Microsoft Office Excel 2007 and Excel 2010 This article contains an overview of the Auto-Recover feature. The files can be recovered if Excel closes unexpectedly, for example, during a power failure. The Auto-Recover feature saves copies of all open Excel files at a user-definable fixed interval. Microsoft Excel now has a built-in Auto-Recover feature that has replaced the Auto-Save add-in that exists in versions of Excel that are earlier than Microsoft Excel 2002.
For more information about this change, read this blog post. Office 365 ProPlus is being renamed to Microsoft 365 Apps for enterprise.