Creating HTTP endpoint fails with 7850 error.

Creating a HTTP endpoint in SQL Server 2005 or SQL Server 2008 may fail with the following error messages: Msg 7850, Level 16, State 1, Line 1 The user ‘domainmyuser’ does not have permission to register endpoint ‘training_sql_endpoint’ on the specified URL.  Please ensure the URL refers to a namespace that is reserved for listening…