Interesting one, I'm seeing a difference in the way credentials are either passed or not passed when accessing a network share. I try to access network shares using the FQDN and IP on 2008 R2 servers (one with SP1 and the other without SP1). Accessing a network share via 2008 R2 and 2008 R2 SP1 (Active Directory priviledges assumed). 2008 R2 - the user is not challenged when accessing a network share either via \\fqdn or \\IP 2008 R2 SP1 - the user is challenged via \\fqdn but not via \\IP Any thoughts?

I have not understood well your question. However, it will be better to ask them here: http://social.technet.microsoft.com/Forums/en-US/winserverfiles/threads This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified Technology Specialist: Designing and Providing Volume Licensing Solutions to Large Organizations Microsoft Certified IT Professional: Enterprise Administrator Microsoft Certified IT Professional: Server Administrator Microsoft Certified Trainer