With the latest versions of the email client, Outlook 2013 or Outlook 2016, all account information is thus tied to your device’s user account and stored locally on your computer. Thus, in this article, we will see how to sign out of Outlook App. In the mobile app, your phone’s built-in security features serve to protect your inbox unless you choose to delete your account in the app. In particular, for those who use the Outlook desktop app for Mac or the Outlook mobile app, “signing out” in the traditional sense is not really possible. And depending on your device, you may not be able to sign out of Outlook without deleting or removing your account. Signing in is relatively easy, but once you get the hang of the Outlook interface, you may have trouble signing out. Before you can do anything in Microsoft Outlook, you need to know how to sign in and out of your email account.