diff --git a/services/containerservice/mgmt/2018-03-31/containerservice/models.go b/services/containerservice/mgmt/2018-03-31/containerservice/models.go
index 29b97b40794c..a0b3584d6f26 100644
--- a/services/containerservice/mgmt/2018-03-31/containerservice/models.go
+++ b/services/containerservice/mgmt/2018-03-31/containerservice/models.go
@@ -1307,6 +1307,8 @@ type ManagedClusterProperties struct {
 	NetworkProfile *NetworkProfile `json:"networkProfile,omitempty"`
 	// AadProfile - Profile of Azure Active Directory configuration.
 	AadProfile *ManagedClusterAADProfile `json:"aadProfile,omitempty"`
+	// APIServerAuthorizedIPRanges - Authorized IP Ranges to kubernetes API server.
+	APIServerAuthorizedIPRanges *[]string `json:"apiServerAuthorizedIPRanges,omitempty"`
 }
 
 // MarshalJSON is the custom marshaler for ManagedClusterProperties.
@@ -1348,6 +1350,9 @@ func (mcp ManagedClusterProperties) MarshalJSON() ([]byte, error) {
 	if mcp.AadProfile != nil {
 		objectMap["aadProfile"] = mcp.AadProfile
 	}
+	if mcp.APIServerAuthorizedIPRanges != nil {
+		objectMap["apiServerAuthorizedIPRanges"] = mcp.APIServerAuthorizedIPRanges
+	}
 	return json.Marshal(objectMap)
 }
 
diff --git a/services/preview/containerservice/mgmt/2018-08-01-preview/containerservice/models.go b/services/preview/containerservice/mgmt/2018-08-01-preview/containerservice/models.go
index 0fac62150ef5..c70983f6f3dd 100644
--- a/services/preview/containerservice/mgmt/2018-08-01-preview/containerservice/models.go
+++ b/services/preview/containerservice/mgmt/2018-08-01-preview/containerservice/models.go
@@ -1453,6 +1453,8 @@ type ManagedClusterProperties struct {
 	NetworkProfile *NetworkProfileType `json:"networkProfile,omitempty"`
 	// AadProfile - Profile of Azure Active Directory configuration.
 	AadProfile *ManagedClusterAADProfile `json:"aadProfile,omitempty"`
+	// APIServerAuthorizedIPRanges - Authorized IP Ranges to kubernetes API server.
+	APIServerAuthorizedIPRanges *[]string `json:"apiServerAuthorizedIPRanges,omitempty"`
 }
 
 // MarshalJSON is the custom marshaler for ManagedClusterProperties.
@@ -1494,6 +1496,9 @@ func (mcp ManagedClusterProperties) MarshalJSON() ([]byte, error) {
 	if mcp.AadProfile != nil {
 		objectMap["aadProfile"] = mcp.AadProfile
 	}
+	if mcp.APIServerAuthorizedIPRanges != nil {
+		objectMap["apiServerAuthorizedIPRanges"] = mcp.APIServerAuthorizedIPRanges
+	}
 	return json.Marshal(objectMap)
 }
 
diff --git a/services/preview/containerservice/mgmt/2018-09-30-preview/containerservice/models.go b/services/preview/containerservice/mgmt/2018-09-30-preview/containerservice/models.go
index 9d415dcb4e90..d3fb74c1ef12 100644
--- a/services/preview/containerservice/mgmt/2018-09-30-preview/containerservice/models.go
+++ b/services/preview/containerservice/mgmt/2018-09-30-preview/containerservice/models.go
@@ -1432,6 +1432,8 @@ type ManagedClusterProperties struct {
 	NetworkProfile *NetworkProfileType `json:"networkProfile,omitempty"`
 	// AadProfile - Profile of Azure Active Directory configuration.
 	AadProfile *ManagedClusterAADProfile `json:"aadProfile,omitempty"`
+	// APIServerAuthorizedIPRanges - Authorized IP Ranges to kubernetes API server.
+	APIServerAuthorizedIPRanges *[]string `json:"apiServerAuthorizedIPRanges,omitempty"`
 }
 
 // MarshalJSON is the custom marshaler for ManagedClusterProperties.
@@ -1473,6 +1475,9 @@ func (mcp ManagedClusterProperties) MarshalJSON() ([]byte, error) {
 	if mcp.AadProfile != nil {
 		objectMap["aadProfile"] = mcp.AadProfile
 	}
+	if mcp.APIServerAuthorizedIPRanges != nil {
+		objectMap["apiServerAuthorizedIPRanges"] = mcp.APIServerAuthorizedIPRanges
+	}
 	return json.Marshal(objectMap)
 }