Add more details in args description

Author: Qi Xiao

README.md

@@ -27,10 +27,10 @@ For more information about Azure Data Factory, see [https://docs.microsoft.com/e
 |---|---|---|
 | `AUTH_KEY` | Required, the authentication key for the self-hosted integration runtime. | None
 | `NODE_NAME` | Optional, the specified name of the node. | hostname |
-| `ENABLE_HA` | Optional, the flag to enable high availability. | false |
-| `HA_PORT` | Optional, the port for high availability. | 8060 |
-| `ENABLE_AE` | Optional, the flag to enable offline nodes auto-expiration.<br/> Only works when `ENABLE_HA=true`. | false |
-| `AE_TIME` | Optional, the expiration time for offline nodes in seconds. <br/>Should be no less than 600. | 600 | 
+| `ENABLE_HA` | Optional, the flag to enable high availability and scalability.<br/> It supports up to 4 nodes registered to the same IR when `HA` is enabled, otherwise only 1 is allowed. | false |
+| `HA_PORT` | Optional, the port to set up a high availability cluster. | 8060 |
+| `ENABLE_AE` | Optional, the flag to enable offline nodes auto-expiration.<br/> If enabled, the expired nodes will be removed automatically from the IR when a new node is attempting to register.<br/> Only works when `ENABLE_HA=true`. | false |
+| `AE_TIME` | Optional, the expiration timeout duration for offline nodes in seconds. <br/>Should be no less than 600 (10 minutes). | 600 | 
 
 # Contributing