I have a server running 2008R2 and Exchange 2010. just all of a sudden it would not allow me to login in to the domain saying that the trust relationship was broken. I removed it from the domain and then rejoined. After it rebooted it I logged in without an issue but I have no network connectivity and I cannot open the network and sharing center, it just never hangs and never opens. I can go to a command prompt and ping the domain controller and the domain controller can ping it. That's all the networking I have. The network icon on the task bar has an "X" on it. When I bring it up in safe mode with networking the networking is fine. I can browse the network and the internet with not problems. I can go into the network adapter properties without issue. So I'm guessing the problem is with Exchange but that is only a guess. Please help!!!