I read this thread:
http://social.technet.microsoft.com/Forums/en-US/windowsserver2008r2networking/thread/9f93508c-71fa-4807-b41a-8f558563afe3
Good news - a hotfix is in the works and a workaround has been identified:
Root cause is that since this is SMB1 all user sessions are on a single TCP connection to the remote server. The first user to initiate a connection to the remote SMB server has their logon-ID added to the structure defining the connection. If that
user logs off all subsequent uses of that TCP session fail as the logon-id is no longer valid. As a workaround for now to keep the issue from happening you will want to have the user not logoff the Terminal Server only disconnect their sessions.
And there should been a hotfix for this issue, where can I find this? As a moderator said there should be a hotfix for this issue.