diff --git a/pkg/api/agentPoolOnlyApi/v20180331/merge.go b/pkg/api/agentPoolOnlyApi/v20180331/merge.go
index ab75e3b4b3..f467119e33 100644
--- a/pkg/api/agentPoolOnlyApi/v20180331/merge.go
+++ b/pkg/api/agentPoolOnlyApi/v20180331/merge.go
@@ -42,19 +42,6 @@ func (mc *ManagedCluster) Merge(emc *ManagedCluster) error {
 		mc.Properties.KubernetesVersion = emc.Properties.KubernetesVersion
 	}
 
-	// Merge properties.enableRBAC
-	if emc.Properties.EnableRBAC == nil {
-		return errors.New("existing ManagedCluster expect properties.enableRBAC not to be nil")
-	}
-
-	if mc.Properties.EnableRBAC == nil {
-		// For update scenario, the default behavior is to use existing behavior
-		mc.Properties.EnableRBAC = emc.Properties.EnableRBAC
-	} else if *mc.Properties.EnableRBAC != *emc.Properties.EnableRBAC {
-		return errors.Errorf("existing ManagedCluster has properties.enableRBAC %v. update to %v is not supported",
-			*emc.Properties.EnableRBAC,
-			*mc.Properties.EnableRBAC)
-	}
 	if mc.Properties.NetworkProfile == nil {
 		// For update scenario, the default behavior is to use existing behavior
 		mc.Properties.NetworkProfile = emc.Properties.NetworkProfile
diff --git a/pkg/api/agentPoolOnlyApi/v20180331/merge_test.go b/pkg/api/agentPoolOnlyApi/v20180331/merge_test.go
index c81b9a7e05..fb9e3941c1 100644
--- a/pkg/api/agentPoolOnlyApi/v20180331/merge_test.go
+++ b/pkg/api/agentPoolOnlyApi/v20180331/merge_test.go
@@ -62,108 +62,6 @@ func TestMerge_DNSPrefix(t *testing.T) {
 	}
 }
 
-func TestMerge_EnableRBAC(t *testing.T) {
-	newMC := &ManagedCluster{
-		Properties: &Properties{
-			EnableRBAC: nil,
-		},
-	}
-
-	existingMC := &ManagedCluster{
-		Properties: &Properties{
-			DNSPrefix:  "something",
-			EnableRBAC: helpers.PointerToBool(false),
-		},
-	}
-
-	e := newMC.Merge(existingMC)
-	if e != nil {
-		t.Error("expect error to be nil")
-	}
-	if newMC.Properties.EnableRBAC == nil || *newMC.Properties.EnableRBAC != false {
-		t.Error("expect EnableRBAC to be same with existing when omit in updating")
-	}
-
-	newMC = &ManagedCluster{
-		Properties: &Properties{
-			EnableRBAC: nil,
-		},
-	}
-
-	existingMC = &ManagedCluster{
-		Properties: &Properties{
-			DNSPrefix:  "something",
-			EnableRBAC: helpers.PointerToBool(true),
-		},
-	}
-
-	e = newMC.Merge(existingMC)
-	if e != nil {
-		t.Error("expect error to be nil")
-	}
-	if newMC.Properties.EnableRBAC == nil || *newMC.Properties.EnableRBAC != true {
-		t.Error("expect EnableRBAC to be same with existing when omit in updating")
-	}
-
-	newMC = &ManagedCluster{
-		Properties: &Properties{
-			EnableRBAC: nil,
-		},
-	}
-
-	existingMC = &ManagedCluster{
-		Properties: &Properties{
-			DNSPrefix:  "something",
-			EnableRBAC: nil,
-		},
-	}
-
-	e = newMC.Merge(existingMC)
-	if e == nil {
-		t.Error("expect error not to be nil")
-	}
-
-	newMC = &ManagedCluster{
-		Properties: &Properties{
-			EnableRBAC: helpers.PointerToBool(true),
-		},
-	}
-
-	existingMC = &ManagedCluster{
-		Properties: &Properties{
-			DNSPrefix:  "something",
-			EnableRBAC: helpers.PointerToBool(true),
-		},
-	}
-
-	e = newMC.Merge(existingMC)
-	if e != nil {
-		t.Error("expect error to be nil")
-	}
-	if newMC.Properties.EnableRBAC == nil || *newMC.Properties.EnableRBAC != true {
-		t.Error("expect EnableRBAC to be true")
-	}
-
-	newMC = &ManagedCluster{
-		Properties: &Properties{
-			EnableRBAC: helpers.PointerToBool(false),
-		},
-	}
-
-	existingMC = &ManagedCluster{
-		Properties: &Properties{
-			DNSPrefix:  "something",
-			EnableRBAC: helpers.PointerToBool(true),
-		},
-	}
-
-	e = newMC.Merge(existingMC)
-	if e == nil {
-		t.Error("expect error to be nil")
-	}
-
-}
-
 func TestMerge_AAD(t *testing.T) {
 	// Partial AAD profile was passed during update
 	newMC := &ManagedCluster{