The Problem The configuration of the system when this error was encountered is as follows: A. Windows Server 2008 R2 Redundant Domain Controllers - we will call these DC1.joshwieder.com and DC2.joshwieder.com B. Windows Server 2003 Web Server with Windows Remote Management enabled / part of the Active directory deployment - we will call this WEB.joshwieder.com C. For the sake of our example, let's say I have configured an OU named "Web Servers" on those domain controllers Whenever the Windows 2003 Web server reboots, or WinRM.exe service on the Windows 2003 Web server restarts, the following error was logged into the Event Viewer: Event ID: 10154 Source: Microsoft-Windows-WinRM Version: 6.1 Symbolic Name: LOG_WSMAN_SPN_CREATION Message: The WinRM service failed to create the following SPN: %1. Additional Data The error received was 8344: Insufficient access rights to perform the operation. User Action The SPN can be created by an administrator using sets