diff --git a/lib/src/screens/pipeline_detail/controller_pipeline_detail.dart b/lib/src/screens/pipeline_detail/controller_pipeline_detail.dart
index 03f8ee31..80fa0eb6 100644
--- a/lib/src/screens/pipeline_detail/controller_pipeline_detail.dart
+++ b/lib/src/screens/pipeline_detail/controller_pipeline_detail.dart
@@ -11,6 +11,9 @@ class _PipelineDetailController with ShareMixin, AdsMixin, ApiErrorHelper {
 
   final pipeStages = ValueNotifier<List<_Stage>?>(null);
 
+  /// Graph descriptors identifying the current user as an approver (own descriptor + groups).
+  Set<String> _approverDescriptors = {};
+
   Timer? _timer;
 
   Pipeline get pipeline => buildDetail.value!.data!.pipeline;
@@ -60,6 +63,11 @@ class _PipelineDetailController with ShareMixin, AdsMixin, ApiErrorHelper {
     final approvals = await api.getPipelineApprovals(pipeline: res.data!.pipeline);
     res.data!.pipeline.approvals = approvals.data ?? [];
 
+    if (approvals.data?.isNotEmpty ?? false) {
+      final descriptors = await api.getCurrentUserApproverDescriptors();
+      _approverDescriptors = descriptors.data ?? {};
+    }
+
     buildDetail.value = res;
 
     final realLogs = res.data!.timeline.where((r) => r.order < 1000);
@@ -262,21 +270,21 @@ class _PipelineDetailController with ShareMixin, AdsMixin, ApiErrorHelper {
   }
 
   bool _canApprove(Approval approval) {
-    final pendingStep = approval.steps.firstWhereOrNull((s) => s.isPending);
-    if (pendingStep == null) return false;
-
-    final userEmail = api.user!.emailAddress;
+    if (_isBlockedApprover(approval)) return false;
 
-    return !_isBlockedApprover(approval) && (pendingStep.assignedApprover.uniqueName == userEmail);
+    return approval.steps.any((s) => s.isPending && _isCurrentUser(s.assignedApprover));
   }
 
-  bool _isBlockedApprover(Approval approval) {
-    final pendingStep = approval.steps.firstWhereOrNull((s) => s.isPending);
-    if (pendingStep == null) return false;
+  bool _isBlockedApprover(Approval approval) => approval.blockedApprovers.any(_isCurrentUser);
 
-    final userEmail = api.user!.emailAddress;
+  /// Whether [approver] represents the current user, either directly or via a group membership.
+  bool _isCurrentUser(AssignedApprover approver) {
+    final user = api.user!;
+    final email = user.emailAddress?.toLowerCase();
 
-    return approval.blockedApprovers.map((a) => a.uniqueName).contains(userEmail);
+    return (email != null && approver.uniqueName.toLowerCase() == email) ||
+        (approver.id.isNotEmpty && approver.id == user.id) ||
+        (approver.descriptor.isNotEmpty && _approverDescriptors.contains(approver.descriptor));
   }
 
   Future<void> _approveApproval(Approval approval) async {
diff --git a/lib/src/services/azure_api_service.dart b/lib/src/services/azure_api_service.dart
index d6105b46..3f6886f1 100644
--- a/lib/src/services/azure_api_service.dart
+++ b/lib/src/services/azure_api_service.dart
@@ -260,6 +260,10 @@ abstract class AzureApiService {
 
   Future<ApiResponse<bool>> rejectPipelineApproval({required Approval approval, required String projectId});
 
+  /// Returns the graph descriptors that identify the current user as an approver:
+  /// the user's own descriptor plus every group the user belongs to (transitively).
+  Future<ApiResponse<Set<String>>> getCurrentUserApproverDescriptors();
+
   Future<ApiResponse<PipelineWithTimeline>> getPipeline({required String projectName, required int id});
 
   Future<ApiResponse<String>> getPipelineTaskLogs({
@@ -418,6 +422,10 @@ class AzureApiServiceImpl with AppLogger implements AzureApiService {
   List<GraphUser> get allUsers => _allUsers;
   List<GraphUser> _allUsers = [];
 
+  /// Cached set of graph descriptors identifying the current user as an approver
+  /// (own descriptor + all groups they belong to). Computed at most once per session.
+  Set<String>? _userApproverDescriptors;
+
   @override
   bool get isImageUnauthorized => _isImageUnauthorized;
   bool _isImageUnauthorized = false;
@@ -2471,6 +2479,37 @@ class AzureApiServiceImpl with AppLogger implements AzureApiService {
     return ApiResponse.ok(user);
   }
 
+  @override
+  Future<ApiResponse<Set<String>>> getCurrentUserApproverDescriptors() async {
+    if (_userApproverDescriptors != null) return ApiResponse.ok(_userApproverDescriptors!);
+
+    if (_allUsers.isEmpty) await _getUsers();
+
+    final email = user?.emailAddress;
+    final descriptor = _allUsers.firstWhereOrNull((u) => u.mailAddress == email)?.descriptor;
+    if (descriptor == null) return ApiResponse.ok(<String>{});
+
+    final descriptors = <String>{descriptor};
+    // Walk the membership graph upwards to collect every (transitive) group the user belongs to.
+    final toVisit = <String>[descriptor];
+    while (toVisit.isNotEmpty) {
+      final current = toVisit.removeLast();
+      final res = await _get(
+        '$_usersBasePath/$_organization/_apis/graph/memberships/$current?direction=up&$_apiVersion-preview',
+      );
+      if (res.isError) continue;
+
+      final value = (jsonDecode(res.body) as Map<String, dynamic>)['value'] as List<dynamic>? ?? [];
+      for (final membership in value) {
+        final container = (membership as Map<String, dynamic>)['containerDescriptor'] as String?;
+        if (container != null && descriptors.add(container)) toVisit.add(container);
+      }
+    }
+
+    _userApproverDescriptors = descriptors;
+    return ApiResponse.ok(descriptors);
+  }
+
   @override
   Future<ApiResponse<GraphUser>> getUserFromDisplayName({required String name}) async {
     if (_allUsers.isEmpty) await _getUsers();
@@ -2509,6 +2548,7 @@ class AzureApiServiceImpl with AppLogger implements AzureApiService {
     _organization = '';
     _chosenProjects = null;
     _allUsers.clear();
+    _userApproverDescriptors = null;
     _user = null;
     dispose();
   }
diff --git a/test/api_service_mock.dart b/test/api_service_mock.dart
index 42767a71..d4071b48 100644
--- a/test/api_service_mock.dart
+++ b/test/api_service_mock.dart
@@ -177,6 +177,11 @@ class AzureApiServiceMock implements AzureApiService {
     return ApiResponse.ok(true);
   }
 
+  @override
+  Future<ApiResponse<Set<String>>> getCurrentUserApproverDescriptors() async {
+    return ApiResponse.ok(<String>{});
+  }
+
   @override
   Future<ApiResponse<List<Commit>>> getRecentCommits({
     Set<Project>? projects,