In My Windows Server 2008 R2 OS in the Event Viewer ther is an error pertains as NPS Error ID 24 states-(The RADIUS Proxy could not resolve the name of remote RADIUS server \\WIN-6JQT8F105TE in remote RADIUS server group Microsoft Routing and Remote Access Service Accounting Servers to an IP address. The error code is 11004.) What is this error? And What is the remedy for this error? - System - Provider [ Name] NPS - EventID 24 [ Qualifiers] 49152 Level 2 Task 0 Keywords 0x80000000000000 - TimeCreated [ SystemTime] 2011-12-09T11:31:28.000000000Z EventRecordID 15976 Channel System Computer WIN-6JQT8F105TE.mumthaz.contoso.com Security - EventData \\WIN-6JQT8F105TE Microsoft Routing and Remote Access Service Accounting Servers 11004 MumthazMuhsin

I hope you have check this resolution. For NPS queries, post here. Thanks

Read Technet article here http://technet.microsoft.com/en-us/library/cc735368(WS.10).aspx Regards Milos

Looks like a DNS name resolution issue. Have you tried specifying the Ip address instead of the name? OR can you ping that host by name? If not you may have to do some configuration to you DNS and we will need more information regarding your current network topology. For now try to change the host name to an IP address. Also I think that \\WIN-6JQT8F105TE should be WIN-6JQT8F105TE for dns to resolve the name correctly. Make sure that the firewall on the remote RADIUS server allows RADIUS traffic, and that the RADIUS proxy and RADIUS server send RADIUS traffic over the same UDP ports. To configure NPS UDP port information: Click Start, Administrative Tools, Network Policy Server. The Network Policy Server Microsoft Management Console (MMC) opens. Right-click Network Policy Server, and then click Properties. Click the Ports tab, and then examine the settings for ports. If your RADIUS authentication and RADIUS accounting UDP ports vary from the default values provided (1812 and 1645 for authentication and 1813 and 1646 for accounting), type your port settings in Authentication and Accounting. MCTS - Please 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.