I have a Windows 2008 standard terminal server which keeps dropping the local (internal) connection to an SBS 2011 server and PCs on the network. There are no issues between PCs and the SBS server.
Rebooting the server solves the issue but will drop connections anything between two hours and 24 hours!! This only happens internally never when users are connecting via terminal services.
The server hosts an SQL database which is used by users to access both internally and externally.