diff --git a/services/apimanagement/mgmt/2019-01-01/apimanagement/group.go b/services/apimanagement/mgmt/2019-01-01/apimanagement/group.go
index 2ab4725f57e3..1ba59c2c6a29 100644
--- a/services/apimanagement/mgmt/2019-01-01/apimanagement/group.go
+++ b/services/apimanagement/mgmt/2019-01-01/apimanagement/group.go
@@ -66,8 +66,7 @@ func (client GroupClient) CreateOrUpdate(ctx context.Context, resourceGroupName
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}},
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: parameters,
 			Constraints: []validation.Constraint{{Target: "parameters.GroupCreateParametersProperties", Name: validation.Null, Rule: false,
 				Chain: []validation.Constraint{{Target: "parameters.GroupCreateParametersProperties.DisplayName", Name: validation.Null, Rule: true,
@@ -172,8 +171,7 @@ func (client GroupClient) Delete(ctx context.Context, resourceGroupName string,
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}}}); err != nil {
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("apimanagement.GroupClient", "Delete", err.Error())
 	}
 
@@ -263,8 +261,7 @@ func (client GroupClient) Get(ctx context.Context, resourceGroupName string, ser
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}}}); err != nil {
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("apimanagement.GroupClient", "Get", err.Error())
 	}
 
@@ -354,8 +351,7 @@ func (client GroupClient) GetEntityTag(ctx context.Context, resourceGroupName st
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}}}); err != nil {
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("apimanagement.GroupClient", "GetEntityTag", err.Error())
 	}
 
@@ -592,8 +588,7 @@ func (client GroupClient) Update(ctx context.Context, resourceGroupName string,
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}}}); err != nil {
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("apimanagement.GroupClient", "Update", err.Error())
 	}
 
diff --git a/services/apimanagement/mgmt/2019-01-01/apimanagement/groupuser.go b/services/apimanagement/mgmt/2019-01-01/apimanagement/groupuser.go
index c22c27d93578..8f14980bd226 100644
--- a/services/apimanagement/mgmt/2019-01-01/apimanagement/groupuser.go
+++ b/services/apimanagement/mgmt/2019-01-01/apimanagement/groupuser.go
@@ -65,8 +65,7 @@ func (client GroupUserClient) CheckEntityExists(ctx context.Context, resourceGro
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}},
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: userID,
 			Constraints: []validation.Constraint{{Target: "userID", Name: validation.MaxLength, Rule: 80, Chain: nil},
 				{Target: "userID", Name: validation.MinLength, Rule: 1, Chain: nil},
@@ -161,8 +160,7 @@ func (client GroupUserClient) Create(ctx context.Context, resourceGroupName stri
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}},
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: userID,
 			Constraints: []validation.Constraint{{Target: "userID", Name: validation.MaxLength, Rule: 80, Chain: nil},
 				{Target: "userID", Name: validation.MinLength, Rule: 1, Chain: nil},
@@ -258,8 +256,7 @@ func (client GroupUserClient) Delete(ctx context.Context, resourceGroupName stri
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}},
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: userID,
 			Constraints: []validation.Constraint{{Target: "userID", Name: validation.MaxLength, Rule: 80, Chain: nil},
 				{Target: "userID", Name: validation.MinLength, Rule: 1, Chain: nil},
@@ -362,8 +359,7 @@ func (client GroupUserClient) List(ctx context.Context, resourceGroupName string
 				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}},
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: top,
 			Constraints: []validation.Constraint{{Target: "top", Name: validation.Null, Rule: false,
 				Chain: []validation.Constraint{{Target: "top", Name: validation.InclusiveMinimum, Rule: 1, Chain: nil}}}}},
diff --git a/services/apimanagement/mgmt/2019-01-01/apimanagement/productgroup.go b/services/apimanagement/mgmt/2019-01-01/apimanagement/productgroup.go
index 3f0671bd015a..4e6158a7d5c4 100644
--- a/services/apimanagement/mgmt/2019-01-01/apimanagement/productgroup.go
+++ b/services/apimanagement/mgmt/2019-01-01/apimanagement/productgroup.go
@@ -69,8 +69,7 @@ func (client ProductGroupClient) CheckEntityExists(ctx context.Context, resource
 				{Target: "productID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}}}); err != nil {
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("apimanagement.ProductGroupClient", "CheckEntityExists", err.Error())
 	}
 
@@ -165,8 +164,7 @@ func (client ProductGroupClient) CreateOrUpdate(ctx context.Context, resourceGro
 				{Target: "productID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}}}); err != nil {
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("apimanagement.ProductGroupClient", "CreateOrUpdate", err.Error())
 	}
 
@@ -262,8 +260,7 @@ func (client ProductGroupClient) Delete(ctx context.Context, resourceGroupName s
 				{Target: "productID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}},
 		{TargetValue: groupID,
 			Constraints: []validation.Constraint{{Target: "groupID", Name: validation.MaxLength, Rule: 256, Chain: nil},
-				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "groupID", Name: validation.Pattern, Rule: `^[^*#&+:<>?]+$`, Chain: nil}}}}); err != nil {
+				{Target: "groupID", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("apimanagement.ProductGroupClient", "Delete", err.Error())
 	}