In an event of a crash, reboot, or even explicit closure of the app by the user when multiple Outlook windows are open, a prompt asking users if they want to “reopen items your last session” is served. Though minor, the ability to restore all open windows in the event of an unexpected crash will be useful for those that use the desktop Outlook client extensively.
The feature will be turned on by default, but there are a few preference options for users. This includes open emails, drafts, or other windows. Microsoft is adding a nifty new feature to Outlook for Windows that lets users restore any open windows in the app that were closed unexpectedly.