diff --git a/extensions/data-transfer/portability-data-transfer-microsoft/src/main/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponse.java b/extensions/data-transfer/portability-data-transfer-microsoft/src/main/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponse.java
index 1a77ca4a7..a2c0f5904 100644
--- a/extensions/data-transfer/portability-data-transfer-microsoft/src/main/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponse.java
+++ b/extensions/data-transfer/portability-data-transfer-microsoft/src/main/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponse.java
@@ -218,7 +218,7 @@ public MicrosoftApiResponse returnConvertDtpException(String message)
 
   private FatalState toFatalState() {
     checkState(isFatal(), "cannot explain fatal state when is apparently recoverable");
-    if (httpStatus() == 403 && httpMessage().contains("Access Denied")) {
+    if (httpStatus() == 403 && bodyContains("accessDenied")) {
       return FatalState.FATAL_STATE_FATAL_PERMISSION_DENIED;
     }
     // Nit: we _could_ just parse the body into json properly and make sure the JSON body "message"
diff --git a/extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponseTest.java b/extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponseTest.java
index 61e281a72..99f30ab4b 100644
--- a/extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponseTest.java
+++ b/extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponseTest.java
@@ -37,7 +37,16 @@ public void testOkay() throws IOException {
 
   @Test
   public void testErrorPermission() throws IOException {
-    Response networkResponse = fakeResponse(403, "Access Denied").build();
+    Response networkResponse = fakeResponse(403, "",
+        "{" +
+            "\"error\": {" +
+                "\"code\":\"accessDenied\"," +
+                "\"message\":\"Access Denied\"," +
+                "\"localizedMessage\":\"アイテムが削除されているか、期限切れになっているか、またはこのアイテムへのアクセス許可がない可能性があります。詳細については、このアイテムの所有者に問い合わせてください。\"," +
+                "\"innerError\": {\"date\":\"2024-12-24T01:03:02\",\"request-id\":\"fake-request-id\",\"client-request-id\":\"fake-client-request-id\"}" +
+            "}" +
+        "}"
+        ).build();
 
     MicrosoftApiResponse response = MicrosoftApiResponse.ofResponse(networkResponse);
 
diff --git a/extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/media/MicrosoftMediaImporterTest.java b/extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/media/MicrosoftMediaImporterTest.java
index 7bb786309..d005847a2 100644
--- a/extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/media/MicrosoftMediaImporterTest.java
+++ b/extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/media/MicrosoftMediaImporterTest.java
@@ -175,7 +175,16 @@ public void testImportItemPermissionDenied() throws Exception {
                     r.url()
                         .toString()
                         .equals("https://www.baseurl.com/v1.0/me/drive/special/photos/children")));
-    Response response = fakeErrorResponse(403, "Access Denied", "{\"id\": \"id1\"}").build();
+    Response response = fakeResponse(403, "",
+        "{" +
+            "\"error\": {" +
+                "\"code\":\"accessDenied\"," +
+                "\"message\":\"Access Denied\"," +
+                "\"localizedMessage\":\"アイテムが削除されているか、期限切れになっているか、またはこのアイテムへのアクセス許可がない可能性があります。詳細については、このアイテムの所有者に問い合わせてください。\"," +
+                "\"innerError\": {\"date\":\"2024-12-24T01:03:02\",\"request-id\":\"fake-request-id\",\"client-request-id\":\"fake-client-request-id\"}" +
+            "}" +
+        "}"
+        ).build();
     when(call.execute()).thenReturn(response);
 
     assertThrows(