How to fix logon failure error. I am getting a error that unknown username and bad password. The same account was working before. The problem is related ot
MICROSOFT_AUTHENTICATION_PACKAGE_V1_0. I found the port which was associated with the login. It is port number 25. But not aware that why it is giving this kind of error on the screen. I need some help here. It looks some kind of virus attack in the system.
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