In an event when there’s an unexpected failure or forced closure of the Outlook app by the user, the service will attempt to remind the user to reopen items from the last session via a prompt message –

Stop Outlook from reopening emails after a crash

In its release notes, Microsoft mentioned, The setting is enabled by default, but there are some preference options listed for users which allow them to disable this feature. Let’s see the above steps in a bit of detail!

Launch Microsoft Outlook app. If you don’t have it, download, and install it. Next, choose the ‘File’ tab from the Ribbon menu. Select ‘Options’ from the list. Next, switch to the right-pane and scroll down to the ‘Startup options’ section. Under it, you should find an option that says, ‘When Outlook reopens’.

When seen, click the drop-down menu button to make all the options visible. There are the following options,

Ask me If I want to restore previous items.Never restore previous items.Always restore previous items.

Now, since you want to disable Outlook from reopening the previous items, choose the option that reads ‘Never restore previous items’. When done, hit the ‘Ok’ button to apply the changes made. Hereafter, your Outlook account will not reopen your previous session, if it failed or crashed unexpectedly and the prompt message will not be displayed. That’s all there is to it!