在[MS-ASCMD]中，Settings命令的功能这样定义的：
| The Settings command also sends device information to the server, implements the device password/personal identification number (PIN) recovery, and retrieves a list of the user's email addresses. |
理解：设置命令将设备信息发送到服务器，完成设备密码或者个人识别号码(PIN)的恢复，并接收用户的邮件地址列表。
存在的疑问：这样做的意义在哪里？客户端不可能不知道自己的邮件地址！！
request<------>Response 
RightsManagementInformation
In Settings command requests, the RightsManagementInformation element is a container node that is used to request rights management information settings.
In Settings command responses, the RightsManagementInformation element is a container node that contains rights management information settings retrieved from the server.
If the RightsManagementInformation element is specified in the request, it MUST include the Get child element.
Settings流程
request<------>Response
168 IRM_FeatureDisabled The Information Rights Management feature is disabled