diff --git a/internal/services/nginx/nginx_deployment_data_source.go b/internal/services/nginx/nginx_deployment_data_source.go
index cdfa5968041f3..7533a319eae8f 100644
--- a/internal/services/nginx/nginx_deployment_data_source.go
+++ b/internal/services/nginx/nginx_deployment_data_source.go
@@ -13,6 +13,7 @@ import (
 	"github.com/hashicorp/go-azure-helpers/resourcemanager/commonschema"
 	"github.com/hashicorp/go-azure-helpers/resourcemanager/identity"
 	"github.com/hashicorp/go-azure-sdk/resource-manager/nginx/2024-09-01-preview/nginxdeployment"
+	"github.com/hashicorp/terraform-provider-azurerm/internal/features"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/sdk"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/tf/pluginsdk"
 	"github.com/hashicorp/terraform-provider-azurerm/internal/tf/validation"
@@ -56,7 +57,7 @@ func (m DeploymentDataSource) Arguments() map[string]*pluginsdk.Schema {
 }
 
 func (m DeploymentDataSource) Attributes() map[string]*pluginsdk.Schema {
-	return map[string]*pluginsdk.Schema{
+	dataSource := map[string]*pluginsdk.Schema{
 		"nginx_version": {
 			Type:     pluginsdk.TypeString,
 			Computed: true,
@@ -69,11 +70,6 @@ func (m DeploymentDataSource) Attributes() map[string]*pluginsdk.Schema {
 			Computed: true,
 		},
 
-		"managed_resource_group": {
-			Type:     pluginsdk.TypeString,
-			Computed: true,
-		},
-
 		"location": commonschema.LocationComputed(),
 
 		"capacity": {
@@ -196,6 +192,15 @@ func (m DeploymentDataSource) Attributes() map[string]*pluginsdk.Schema {
 
 		"tags": commonschema.TagsDataSource(),
 	}
+
+	if !features.FivePointOhBeta() {
+		dataSource["managed_resource_group"] = &pluginsdk.Schema{
+			Deprecated: "The `managed_resource_group` field has been deprecated and will be removed in v5.0 of the AzureRM Provider.",
+			Type:       pluginsdk.TypeString,
+			Computed:   true,
+		}
+	}
+	return dataSource
 }
 
 func (m DeploymentDataSource) ModelObject() interface{} {
@@ -245,7 +250,6 @@ func (m DeploymentDataSource) Read() sdk.ResourceFunc {
 				output.Identity = *flattenedIdentity
 				if props := model.Properties; props != nil {
 					output.IpAddress = pointer.ToString(props.IPAddress)
-					output.ManagedResourceGroup = pointer.ToString(props.ManagedResourceGroup)
 					output.NginxVersion = pointer.ToString(props.NginxVersion)
 					output.DiagnoseSupportEnabled = pointer.ToBool(props.EnableDiagnosticsSupport)
 
diff --git a/internal/services/nginx/nginx_deployment_resource.go b/internal/services/nginx/nginx_deployment_resource.go
index 7688e5fd44db4..23a51536f5929 100644
--- a/internal/services/nginx/nginx_deployment_resource.go
+++ b/internal/services/nginx/nginx_deployment_resource.go
@@ -111,14 +111,6 @@ func (m DeploymentResource) Arguments() map[string]*pluginsdk.Schema {
 
 		"identity": commonschema.SystemAssignedUserAssignedIdentityOptional(),
 
-		"managed_resource_group": {
-			Type:         pluginsdk.TypeString,
-			Optional:     true,
-			Computed:     true,
-			ForceNew:     true,
-			ValidateFunc: validation.StringIsNotEmpty,
-		},
-
 		"location": commonschema.Location(),
 
 		"capacity": {
@@ -336,6 +328,17 @@ func (m DeploymentResource) Arguments() map[string]*pluginsdk.Schema {
 		}
 	}
 
+	if !features.FivePointOhBeta() {
+		resource["managed_resource_group"] = &pluginsdk.Schema{
+			Deprecated:   "The `managed_resource_group` field has been deprecated and will be removed in v5.0 of the AzureRM Provider.",
+			Type:         pluginsdk.TypeString,
+			Optional:     true,
+			Computed:     true,
+			ForceNew:     true,
+			ValidateFunc: validation.StringIsNotEmpty,
+		}
+	}
+
 	return resource
 }
 
@@ -394,7 +397,6 @@ func (m DeploymentResource) Create() sdk.ResourceFunc {
 			}
 
 			prop := &nginxdeployment.NginxDeploymentProperties{}
-			prop.ManagedResourceGroup = pointer.FromString(model.ManagedResourceGroup)
 
 			if len(model.LoggingStorageAccount) > 0 {
 				prop.Logging = &nginxdeployment.NginxLogging{
@@ -557,7 +559,6 @@ func (m DeploymentResource) Read() sdk.ResourceFunc {
 
 				if props := model.Properties; props != nil {
 					output.IpAddress = pointer.ToString(props.IPAddress)
-					output.ManagedResourceGroup = pointer.ToString(props.ManagedResourceGroup)
 					output.NginxVersion = pointer.ToString(props.NginxVersion)
 					output.DiagnoseSupportEnabled = pointer.ToBool(props.EnableDiagnosticsSupport)