But even if the implementation can distinguish between an nonexistent user and incorrect credentials, you still have the situation where a user enters their password correctly, but the wrong username, and that happens to be a user that exists (with a different password) Then, if the user got a message saying their password was incorrect, that · 1 Outlook is configured to prompt for credentials 2 While the wrong password is cached in the credential storage 3 Authentication setting is necessary for an incoming and outgoing server 4 Due to damaged profile, slow, unstable connection 5 Due to installed antivirus Resolution to Outlook Constantly Prompting for Username and Password ErrorAnd then you can adjust the error message however you please
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