add option to set ManagedBy field.

internal/services/resource/resource_group_data_source.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/hashicorp/go-azure-helpers/lang/pointer"
 	"github.com/hashicorp/go-azure-helpers/resourcemanager/commonschema"
 	"github.com/hashicorp/go-azure-helpers/resourcemanager/location"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/clients"
@@ -25,6 +26,10 @@ func dataSourceResourceGroup() *pluginsdk.Resource {
 			"name":     commonschema.ResourceGroupNameForDataSource(),
 			"location": commonschema.LocationComputed(),
 			"tags":     tags.SchemaDataSource(),
+			"managed_by": {
+				Type:     pluginsdk.TypeString,
+				Computed: true,
+			},
 		},
 	}
 }
@@ -50,5 +55,6 @@ func dataSourceResourceGroupRead(d *pluginsdk.ResourceData, meta interface{}) er
 
 	d.Set("name", resp.Name)
 	d.Set("location", location.NormalizeNilable(resp.Location))
+	d.Set("managed_by", pointer.From(resp.ManagedBy))
 	return tags.FlattenAndSet(d, resp.Tags)
 }

internal/services/resource/resource_group_data_source_test.go

@@ -23,6 +23,7 @@ func TestAccDataSourceAzureRMResourceGroup_basic(t *testing.T) {
 				check.That(data.ResourceName).Key("location").HasValue(azure.NormalizeLocation(data.Locations.Primary)),
 				check.That(data.ResourceName).Key("tags.%").HasValue("1"),
 				check.That(data.ResourceName).Key("tags.env").HasValue("test"),
+				check.That(data.ResourceName).Key("managed_by").HasValue("test"),
 			),
 		},
 	})
@@ -41,6 +42,8 @@ resource "azurerm_resource_group" "test" {
   tags = {
     env = "test"
   }
+
+  managed_by = "test"
 }
 
 data "azurerm_resource_group" "test" {

internal/services/resource/resource_group_resource.go

@@ -8,13 +8,15 @@ import (
 	"time"
 
 	"github.com/Azure/azure-sdk-for-go/services/resources/mgmt/2020-06-01/resources" // nolint: staticcheck
+	"github.com/hashicorp/go-azure-helpers/lang/pointer"
 	"github.com/hashicorp/go-azure-helpers/resourcemanager/commonschema"
 	"github.com/hashicorp/go-azure-helpers/resourcemanager/location"
 	"github.com/hashicorp/terraform-provider-azurerm/helpers/tf"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/clients"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/services/resource/parse"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/tags"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/tf/pluginsdk"
+	"github.com/hashicorp/terraform-provider-azurerm/internal/tf/validation"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/timeouts"
 	"github.com/hashicorp/terraform-provider-azurerm/utils"
 )
@@ -43,6 +45,12 @@ func resourceResourceGroup() *pluginsdk.Resource {
 			"location": commonschema.Location(),
 
 			"tags": tags.Schema(),
+
+			"managed_by": {
+				Type:         pluginsdk.TypeString,
+				Optional:     true,
+				ValidateFunc: validation.StringIsNotEmpty,
+			},
 		},
 	}
 }
@@ -74,6 +82,10 @@ func resourceResourceGroupCreateUpdate(d *pluginsdk.ResourceData, meta interface
 		Tags:     tags.Expand(t),
 	}
 
+	if v := d.Get("managed_by").(string); v != "" {
+		parameters.ManagedBy = pointer.To(v)
+	}
+
 	if _, err := client.CreateOrUpdate(ctx, name, parameters); err != nil {
 		return fmt.Errorf("creating Resource Group %q: %+v", name, err)
 	}
@@ -114,6 +126,7 @@ func resourceResourceGroupRead(d *pluginsdk.ResourceData, meta interface{}) erro
 
 	d.Set("name", resp.Name)
 	d.Set("location", location.NormalizeNilable(resp.Location))
+	d.Set("managed_by", pointer.From(resp.ManagedBy))
 	return tags.FlattenAndSet(d, resp.Tags)
 }
 

internal/services/resource/resource_group_resource_test.go

@@ -72,6 +72,22 @@ func TestAccResourceGroup_withTags(t *testing.T) {
 	})
 }
 
+func TestAccResourceGroup_withManagedBy(t *testing.T) {
+	data := acceptance.BuildTestData(t, "azurerm_resource_group", "test")
+	testResource := ResourceGroupResource{}
+	assert := check.That(data.ResourceName)
+	data.ResourceTest(t, testResource, []acceptance.TestStep{
+		{
+			Config: testResource.withManagedByConfig(data),
+			Check: acceptance.ComposeTestCheckFunc(
+				assert.ExistsInAzure(testResource),
+				assert.Key("managed_by").HasValue("test"),
+			),
+		},
+		data.ImportStep(),
+	})
+}
+
 func TestAccResourceGroup_withNestedItemsAndFeatureFlag(t *testing.T) {
 	data := acceptance.BuildTestData(t, "azurerm_resource_group", "test")
 	r := ResourceGroupResource{}
@@ -232,3 +248,18 @@ resource "azurerm_resource_group" "test" {
 }
 `, data.RandomInteger, data.Locations.Primary)
 }
+
+func (t ResourceGroupResource) withManagedByConfig(data acceptance.TestData) string {
+	return fmt.Sprintf(`
+provider "azurerm" {
+  features {}
+}
+
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%d"
+  location = "%s"
+
+  managed_by = "test"
+}
+`, data.RandomInteger, data.Locations.Primary)
+}

website/docs/r/resource_group.html.markdown

@@ -33,6 +33,8 @@ The following arguments are supported:
 
 ---
 
+* `managed_by` - (Optional) The ID of the resource or application that manages this Resource Group.
+
 * `tags` - (Optional) A mapping of tags which should be assigned to the Resource Group.
 
 ## Attributes Reference
@@ -45,15 +47,15 @@ In addition to the Arguments listed above - the following Attributes are exporte
 
 The `timeouts` block allows you to specify [timeouts](https://www.terraform.io/language/resources/syntax#operation-timeouts) for certain actions:
 
-* `create` - (Defaults to 90 minutes) Used when creating the Resource Group.
+* `create` - (Defaults to 1 hour and 30 minutes) Used when creating the Resource Group.
 * `read` - (Defaults to 5 minutes) Used when retrieving the Resource Group.
-* `update` - (Defaults to 90 minutes) Used when updating the Resource Group.
-* `delete` - (Defaults to 90 minutes) Used when deleting the Resource Group.
+* `update` - (Defaults to 1 hour and 30 minutes) Used when updating the Resource Group.
+* `delete` - (Defaults to 1 hour and 30 minutes) Used when deleting the Resource Group.
 
 ## Import
 
 Resource Groups can be imported using the `resource id`, e.g.
 
 ```shell
-terraform import azurerm_resource_group.example /subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/example
-```
+terraform import azurerm_resource_group.example /subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/group1
+```