Thinking this might be a 2008 R2/Win 7 networking issue, and Win7 might have similar issues We have a small farm of 2008 R2 Remote Session Host/ TS boxes (running on a couple VMWare ESXi boxes) Users have access to shares on other 2008/2008R2 servers and ONE 2003 server (required for the application) At seemingly random times users on any one of the servers loose the ability to connect to the 2003 server's shares by a particular type of name. Sometimes it's NETBIOS, sometimes is FQDN, sometimes it's IP. ie \\Server\Share, \\Server.domain.com\share or even \\1.2.3.4\ It could be any of the RS/TS servers (though it seems more common on some than others), and it eventually goes away or changes to another type. It's less likely after a clean boot for a while. When the problem exists no one on that box can access any of shares on that 2003 Server by one or even two methods, including administrator. The error displayed is often "Network Name cannot be found" (it varies though) but the name is always ping-able at a command line. DNS is fine, WINS is running, and I've tried HOSTS file entries as well but the problem persists. Shares on 2008 servers are never affected, and users on the other boxes do not have the same problem at the same time. Any Suggestions? Thanks in advance.

Hi, Does the issue occur with all Windows 7 computers or a specific Windows 7 computer? Is there any Windows XP computers exist? If so, does the issue occur on Windows XP machines? As the issue is mainly relevant to Windows Server side, I recommend you to post your question in Windows Server forums for a better assistance. Here I would like to propose some common troubleshooting for your references: 1. Since the issue occurs randomly, it can be due to network connection status. Ensure that you have installed the latest version of network drivers on the server. 2. If the issue only occurs with Windows 7, please disable Auto Tuning to see if it gets better: netsh int tcp set global autotuninglevel=disabled 3. Disable the offload features such as RSS, Chimney offload: netsh int tcp set global rss=disabled netsh int tcp set global chimney=disabled Best Regards DalePlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.