I set up a domain trust between domain A and domain B. I have domain A and B frowarding DNS informations to each other. The domains are in the same physical location but seperated by firewalls. I have set up static routs in the firewal to connect both domains and connected a them via LAN. You can ping the ip addresses of both domain controllers from each domain controller domain B is 192.168.100.4 and domain A is 192.168.10.5. You can ping fully quillified domain names as well from each location. But in the morning the user in domain B connects to a Share in domain A via a mapped drive. In the morning the mapped drive is disconnected and can not reconnect. I can ping the fully qullified domain name of the server on domain a and visa versa. The only way to fix this it seems is to restart the server in domain A.

http://support.microsoft.com/kb/297684 Dear Check This Artical Hope This Artical Your Problem Is Solve :)DushYant