You must change the sql server system value in the instance configuration , and possibly the system name values in the application definitions , and then update the instance of notification services to apply the changes 必须更改实例配置中的sql server系统值，可能还有应用程序定义中的系统名称值，然后更新notification services实例以应用更改。
Because of this , you must make sure that the system name values in the application definition are the network name which is the virtual server name for any hosted event provider , generator , and distributor that runs on the failover cluster 因此，必须确保应用程序定义中的系统名称值是在故障转移群集上运行的任何宿主事件提供程序、生成器以及分发服务器的网络名称（这是虚拟服务器名称） 。
When you move an instance of notification services , besides the obvious step of installing software and moving files to the new server or servers , you must also update the instance of notification services to specify the name of the new instance of the database engine and the new system name for each hosted event provider , generator , and distributor 当您移动notification services实例时，除了安装软件和将文件移至新的服务器中这个明显的步骤之外，还必须更新notification services实例以便为每个宿主事件提供程序、生成器和分发服务器指定新的数据库引擎实例名称以及新的系统名称。
