Sign Out of Outlook on Windows Desktop AppTo sign out from the Outlook desktop app on Windows, here is what you need to do:Open the Outlook app. Select Account Settings > Sign out. Sign Out of Outlook on iPhoneOn iPhone, logging out requires removing the account from the Outlook app:Open the Outlook mobile app. Sign Out of Outlook on AndroidFor Android users, here are the steps to sign out securely:Launch the Outlook app. Under Sign out everywhere, select Sign out to disconnect your account from all sessions.