This is a small SBS 2008 network which has been experiencing intermittent problems accessing the SBS server. When the problem is occurring the server can be "pinged" from other computers but Outlook will not connect to the Exchange Server (which is running on the server) and files cannot be accessed on shared folders on the server. We can connect to the server remotely OK using RDP. After a period of time the problem resolves itself but will recur several days or weeks later.
The system logs don't appear to show a problem. I am not sure if it is connected to the problem but for some months we have not been able browse to the SBS server but can access it using UNC. There is another "member server" on the network used for RDP access we have not had any problems accessing this.
It is difficult to fault find this as it is an intermittent problem any suggestions as to what may be causing the problem or checks or test we could make would be welcome.