Fallback status point 是 SCCM 2007 系统中的一个 site system role，帮助管理员监控 client 的布署情况以及用来确定 client 安装和委派情况，还可以用来确认 client 是否处于可管理状态。总之，和 client 相关的问题大多可以通过 fallback status point 来排错。
+---------+ send +--------------+ relay +--------+ + SCCM + ---------> + Fallback + ---------> + Site + + client + message + status point + + server + +---------+ +--------------+ +--------+
Attention!!!
1. SMS 2003 client computers cannot use a fallback status point.
2. There is no equivalent of the status message viewer for state messages.
如果决定使用 fallback status point，那就在布署 client 之前就添加好这个 role。另外，虽然可以在一个站点中布署多个 fallback status point，但是每个客户端只能制定一个 fallback status point。
Using the Fallback Status Point for Client Deployment
- 在安装 client 遇到问题的时候，client 会发送到 fallback status point 的消息有如下几种：
- The client failed to install properly (for example, because of incorrect setup options or syntax errors, or because it failed to locate the required files).
- The client failed to be assigned to a site.
- The client failed to register with its assigned site.
- The client failed to locate its management point.
- There was a network connectivity problem between the client and the management point.
- The management point is not configured correctly (for example, Internet Information Services (IIS) is not configured correctly for a Configuration Manager management point).
Attention!!!
在 client 在成功安装之后，也会向 fallback status point 发送一个消息。当需要重启才能完成安装时，也会向 fallback status point 发送一个消息。
Using the Fallback Status Point to Identify Native Mode Communication Problems
因为 fallback status point 能够接收 unauthenticated 的通信，可以从处于 native 模式的客户端接收到由于 PKI 验证问题造成客户端和管理节点之间的通信问题的消息。Examples of state messages a client might send to a fallback status point to identify problems with native mode communication include the following:
- There is no valid client certificate.
- There is more than one possible valid client certificate without an appropriate certificate selection configuration specified.
- A server certificate needed for native mode communication fails to chain successfully to the trusted root certification.
- A server certificate needed for native mode communication is expired.
- A server certificate needed for native mode communication is revoked.