2.2.1.3 Pending Notifications
Pending notifications rely on transmission of one or more of the following methods:
The EcDoAsyncConnectEx method, which is used in asynchronous RPC notifications.
The EcDoAsyncWaitEx method, which is also used in asynchronous RPC notifications.
The EcRRegisterPushNotification method, which is used for push notifications.
The EcDoRpcExt2 method and the RopPending ROP ([MS-OXCROPS] section 2.2.14.3).
The NotificationWait request type as described in [MS-OXCMAPIHTTP] section 2.2.4.4.<3>