diff --git a/APIDOCS.md b/APIDOCS.md
index 64d14e2a..20a12407 100644
--- a/APIDOCS.md
+++ b/APIDOCS.md
@@ -49,7 +49,7 @@ These API calls allow to login or logout using credentials. Once logged in, a se
 
 ### Login
 
-This call authenticates with the server and generates a session token to be used for subsequent API calls.
+This call authenticates with the server and generates a session token to be used for subsequent API calls. The session token expires in 30 minutes from the last API call.
 
 URL:
 `http://localhost:5380/api/login?user=admin&pass=admin`
@@ -3677,6 +3677,7 @@ RESPONSE:
 				"scope": "Default",
 				"type": "Reserved",
 				"hardwareAddress": "00-00-00-00-00-00",
+				"clientIdentifier": "1-000000000000",
 				"address": "192.168.1.5",
 				"hostName": "server1.local",
 				"leaseObtained": "08/25/2020 17:52:51",
@@ -3686,6 +3687,7 @@ RESPONSE:
 				"scope": "Default",
 				"type": "Dynamic",
 				"hardwareAddress": "00-00-00-00-00-00",
+				"clientIdentifier": "1-000000000000",
 				"address": "192.168.1.13",
 				"hostName": null,
 				"leaseObtained": "06/15/2020 16:41:46",
@@ -3695,6 +3697,7 @@ RESPONSE:
 				"scope": "Default",
 				"type": "Dynamic",
 				"hardwareAddress": "00-00-00-00-00-00",
+				"clientIdentifier": "1-000000000000",
 				"address": "192.168.1.15",
 				"hostName": "desktop-ea2miaf.local",
 				"leaseObtained": "06/18/2020 12:19:03",
@@ -3893,7 +3896,8 @@ URL:
 WHERE:
 - `token`: The session token generated by the `login` call.
 - `name`: The name of the DHCP scope.
-- `hardwareAddress`: The MAC address of the device bearing the dynamic/reserved lease.
+- `clientIdentifier` (optional): The client identifier for the lease. Either `hardwareAddress` or `clientIdentifier` must be specified.
+- `hardwareAddress` (optional): The MAC address of the device bearing the dynamic/reserved lease. Either `hardwareAddress` or `clientIdentifier` must be specified.
 
 RESPONSE:
 ```
@@ -3913,7 +3917,8 @@ URL:
 WHERE:
 - `token`: The session token generated by the `login` call.
 - `name`: The name of the DHCP scope.
-- `hardwareAddress`: The MAC address of the device bearing the dynamic lease.
+- `clientIdentifier` (optional): The client identifier for the lease. Either `hardwareAddress` or `clientIdentifier` must be specified.
+- `hardwareAddress` (optional): The MAC address of the device bearing the dynamic lease. Either `hardwareAddress` or `clientIdentifier` must be specified.
 
 RESPONSE:
 ```
@@ -3933,7 +3938,8 @@ URL:
 WHERE:
 - `token`: The session token generated by the `login` call.
 - `name`: The name of the DHCP scope.
-- `hardwareAddress`: The MAC address of the device bearing the reserved lease.
+- `clientIdentifier` (optional): The client identifier for the lease. Either `hardwareAddress` or `clientIdentifier` must be specified.
+- `hardwareAddress` (optional): The MAC address of the device bearing the reserved lease. Either `hardwareAddress` or `clientIdentifier` must be specified.
 
 RESPONSE:
 ```