diff --git a/app/controllers/master_files_controller.rb b/app/controllers/master_files_controller.rb
index c10dcf3cfd..cd845b4991 100644
--- a/app/controllers/master_files_controller.rb
+++ b/app/controllers/master_files_controller.rb
@@ -243,11 +243,8 @@ def hls_manifest
     quality = params[:quality]
     if request.head?
       auth_token = request.headers['Authorization']&.sub('Bearer ', '')
-      if StreamToken.valid_token?(auth_token, @master_file.id) || can?(:read, @master_file)
-        return head :ok
-      else
-        return head :unauthorized
-      end
+      return iiif_auth_probe_resp(success: false) unless StreamToken.valid_token?(auth_token, @master_file.id) || can?(:read, @master_file)
+      iiif_auth_probe_resp(success: true)
     else
       return head :unauthorized if cannot?(:read, @master_file)
       @hls_streams = if quality == "auto"
@@ -283,16 +280,25 @@ def delete_structure
 
   def iiif_auth_token
     if cannot? :read, @master_file
-      head :unauthorized
+      render 'iiif_auth_token_error', layout: false, locals: { message_id: message_id }
     else
       message_id = params[:messageId]
-      origin = params[:origin]
       access_token = StreamToken.find_or_create_session_token(session, @master_file.id)
       expires = (StreamToken.find_by(token: access_token).expires - Time.now.utc).to_i
       render 'iiif_auth_token', layout: false, locals: { message_id: message_id, origin: origin, access_token: access_token, expires: expires }
     end
   end
 
+  def iiif_auth_probe_resp(success: false)
+    {
+      "@context": "http://iiif.io/api/auth/2/context.json",
+      "type": "AuthProbeResult2",
+      "status": success ? 200 : 403,
+      "header": success ? { "en": [I18n.t('iiif.auth.failureHeader')] } : nil,
+      "note": success ? { "en": [I18n.t('iiif.auth.failureDescription')] } : nil
+    }.compact
+  end
+
   def move
     current_media_object = @master_file.media_object
     authorize! :update, current_media_object
diff --git a/app/models/iiif_canvas_presenter.rb b/app/models/iiif_canvas_presenter.rb
index 9a07109542..2675510e03 100644
--- a/app/models/iiif_canvas_presenter.rb
+++ b/app/models/iiif_canvas_presenter.rb
@@ -287,32 +287,33 @@ def structure_ng_xml
 
   def auth_service(quality)
     {
-      "context": "http://iiif.io/api/auth/1/context.json",
-      "@id": Rails.application.routes.url_helpers.new_user_session_url(login_popup: 1),
-      "@type": "AuthCookieService1",
-      "confirmLabel": I18n.t('iiif.auth.confirmLabel'),
-      "description": I18n.t('iiif.auth.description'),
-      "failureDescription": I18n.t('iiif.auth.failureDescription'),
-      "failureHeader": I18n.t('iiif.auth.failureHeader'),
-      "header": I18n.t('iiif.auth.header'),
-      "label": I18n.t('iiif.auth.label'),
-      "profile": "http://iiif.io/api/auth/1/login",
+      "id": Rails.application.routes.url_helpers.hls_manifest_master_file_url(master_file.id, quality: quality),
+      "type": "AuthProbeService2",
+      "errorNote": { "en": [I18n.t('iiif.auth.failureDescription')] },
+      "errorHeading": { "en": [I18n.t('iiif.auth.failureHeader')] },
       "service": [
         {
-          "@id": Rails.application.routes.url_helpers.hls_manifest_master_file_url(master_file.id, quality: quality),
-          "@type": "AuthProbeService1",
-          "profile": "http://iiif.io/api/auth/1/probe"
-        },
-        {
-          "@id": Rails.application.routes.url_helpers.iiif_auth_token_url(id: master_file.id),
-          "@type": "AuthTokenService1",
-          "profile": "http://iiif.io/api/auth/1/token"
-        },
-        {
-          "@id": Rails.application.routes.url_helpers.destroy_user_session_url,
-          "@type": "AuthLogoutService1",
-          "label": I18n.t('iiif.auth.logoutLabel'),
-          "profile": "http://iiif.io/api/auth/1/logout"
+          "id": Rails.application.routes.url_helpers.new_user_session_url(login_popup: 1),
+          "type": "AuthAccessService2",
+          "confirmLabel": { "en": [I18n.t('iiif.auth.confirmLabel')] },
+          "note": { "en": [I18n.t('iiif.auth.description')] },
+          "heading": { "en": [I18n.t('iiif.auth.header')] },
+          "label": { "en": [I18n.t('iiif.auth.label')] },
+          "profile": "active",
+          "service": [
+            {
+              "id": Rails.application.routes.url_helpers.iiif_auth_token_url(id: master_file.id),
+              "type": "AuthAccessTokenService2",
+              "profile": "http://iiif.io/api/auth/1/token",
+              "errorNote": { "en": [I18n.t('iiif.auth.failureDescription')] },
+              "errorHeading": { "en": [I18n.t('iiif.auth.failureHeader')] }
+            },
+            {
+              "id": Rails.application.routes.url_helpers.destroy_user_session_url,
+              "type": "AuthLogoutService2",
+              "label": { "en": [I18n.t('iiif.auth.logoutLabel')] }
+            }
+          ]
         }
       ]
     }
diff --git a/app/views/master_files/iiif_auth_token.html.erb b/app/views/master_files/iiif_auth_token.html.erb
index 72e1523c9c..53141557e6 100644
--- a/app/views/master_files/iiif_auth_token.html.erb
+++ b/app/views/master_files/iiif_auth_token.html.erb
@@ -17,7 +17,13 @@ Unless required by applicable law or agreed to in writing, software distributed
   <body>
     <script>
     window.parent.postMessage(
-      {"expiresIn": <%= expires %>, "accessToken": "<%= access_token %>", "messageId": "<%= message_id %>"},
+      {
+        "@context": "http://iiif.io/api/auth/2/context.json", 
+        "type": "AuthAccessToken2",
+        "accessToken": "<%= access_token %>",
+        "expiresIn": <%= expires %>,  
+        "messageId": "<%= message_id %>" 
+      },
       "<%= origin %>"
     );
     </script>
diff --git a/app/views/master_files/iiif_auth_token_error.html.erb b/app/views/master_files/iiif_auth_token_error.html.erb
new file mode 100644
index 0000000000..9960a31686
--- /dev/null
+++ b/app/views/master_files/iiif_auth_token_error.html.erb
@@ -0,0 +1,30 @@
+<%#
+Copyright 2011-2025, The Trustees of Indiana University and Northwestern
+  University.  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software distributed
+  under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+  CONDITIONS OF ANY KIND, either express or implied. See the License for the
+  specific language governing permissions and limitations under the License.
+---  END LICENSE_HEADER BLOCK  ---
+%>
+<html>
+  <body>
+    <script>
+    window.parent.postMessage(
+      {
+        "@context": "http://iiif.io/api/auth/2/context.json", 
+        "type": "AuthAccessTokenError2",
+        "profile": "missingAspect",
+        "heading": { "en": ["<%= I18n.t('iiif.auth.failureHeader') %>"]},  
+        "messageId": "<%= message_id %>"
+      }
+    );
+    </script>
+  </body>
+</html>