http://blogs.technet.com/askperf/archive/2008/02/16/ws2008-network-level-authentication-and-encryption.aspxWelcome to Day Sixteen.&#160; We're continuing on with our series on Windows Server 2008 in preparation for the launch.&#160; Today, we're going to look at Terminal Server security in Windows Server 2008 - specifically Network Level Authentication anden-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/askperf/archive/2008/02/16/ws2008-network-level-authentication-and-encryption.aspx#2898650Sat, 16 Feb 2008 15:45:54 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:2898650Lionel<p>All these are very welcome additions, but what about interoperability in mixed environments? &nbsp;It would be nicer to distribute or help develop RDP 6.1 (with SSL and NLA) clients for Mac and Linux.</p>http://blogs.technet.com/askperf/archive/2008/02/16/ws2008-network-level-authentication-and-encryption.aspx#3086202Wed, 09 Jul 2008 18:20:23 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3086202Christopher Bakke<p>The Require user authentication for remote connections by using Network Level Authentication Group Policy setting must be set to disabled to allow windows XP machine to remote desktop into Vista Computers. &nbsp;If the setting set to unconfigured it will default to Required and it will be greyed out.</p>