I was going through our Exchange 2010 logs and I came across the attached login attempts. They occur every 15 minutes in the early morning hours. I'm wondering where such a thing could have come from. Our domain is Cxxxxx, no idea where Kingsbeam is.
It's also outside our login hours, but that wasn't the error.
Anyone have any idea how to prevent these or how they are getting in?
Server 2008 R2 x64 running Exchange 2010 SP1