My company just got a 2008 Server Standard Edition. I have it setup as a member server on our domain running Exchange 2007. My problem is that the Server does not stay "discoverable" on the network. I can ping it and I can reach it by it's IP or NetBIOS name. It is registered in AD, and all of the folder shares I created are accessible. The only problem is it does not show up on the network list when I try to view the computers on it from any of our other DCs or workstations. The problem with this is that I cannot add this new server to our Backup Exec 12 selection list because Backup Exec doesn't see it. On the new Server, I have Network Discovery on, file sharing on and public folder sharing on. Under Services, I have Computer Browser started and on automatic. I have SSDP started and on automatic, and I have UPnP Device Host started and on automatic. Under the TCP/IP properties of the Local Area Connection I have "enable NetBIOS over TCP/IP" selected. I also have the firewall turned off for now. The curious thing is, when I reboot the Server, it becomes "discoverable" for about an hour or so then it disappears off of the network list again . Obviously, I can't just keep rebooting several times a day. Again, my only concern is that I can modify the selection list for that server in Backup Exec 12. I can reach the Server and its shares and the Exchange 2007 is running fine. Symantec said that this is a Microsoft issue and couldn't provide much support. Any help would be much appreciated. Thank you in advance.

Hi,Do you have any relevant error messages in the event viewer under System or Application that coincide with server stopped being shown?If so can you post them here please e.g. a service stall etc?I also presume you dont have the network adapter allowed to go into sleep mode?Regards,MarkThe post is provided AS IS and confers no warranties.

Thanks for responding. The only error I am getting (and it is a random error, not when it "disappears" ) is Error 12014 from MSExchangeTransport. I don't believe this has anything to do with my issue. Also, the network adapter is not allowed to go to sleep. Thanks though...got anything else I could try?

1. Please refer to this link I think it will help you http://technet.microsoft.com/en-us/library/bb726989.aspx 2. try to uninstall Symantec AV and use other AV for testing Thanks

Hi,That event ID is to do with the exchange certificate - see the following KB on how to fix (its fairly common on '07 exchange) : http://support.microsoft.com/KB/555855Also - is the server's IP address assigned by DHCP or static IP? - can you post the binding on the network card as well please - also an output of ipconfig may help us troubelshoot. The post is provided AS IS and confers no warranties.