diff --git a/prowler/providers/m365/services/entra/entra_conditional_access_policy_unknown_device_blocked/entra_conditional_access_policy_unknown_device_blocked.py b/prowler/providers/m365/services/entra/entra_conditional_access_policy_unknown_device_blocked/entra_conditional_access_policy_unknown_device_blocked.py
index d248498372..e9e192cdbd 100644
--- a/prowler/providers/m365/services/entra/entra_conditional_access_policy_unknown_device_blocked/entra_conditional_access_policy_unknown_device_blocked.py
+++ b/prowler/providers/m365/services/entra/entra_conditional_access_policy_unknown_device_blocked/entra_conditional_access_policy_unknown_device_blocked.py
@@ -20,6 +20,13 @@ class entra_conditional_access_policy_unknown_device_blocked(Check):
     - FAIL: No CA policy restricts access from unrecognized device platforms.
     """
 
+    @staticmethod
+    def _normalize_platform(platform: object) -> str:
+        normalized_platform = getattr(platform, "value", platform)
+        return (
+            normalized_platform.lower() if isinstance(normalized_platform, str) else ""
+        )
+
     def execute(self) -> list[CheckReportM365]:
         """Execute the check logic.
 
@@ -43,15 +50,29 @@ class entra_conditional_access_policy_unknown_device_blocked(Check):
             if not policy.conditions.platform_conditions:
                 continue
 
-            if (
-                "all"
-                not in policy.conditions.platform_conditions.included_platforms
-            ):
+            included_platforms = {
+                normalized_platform
+                for normalized_platform in map(
+                    self._normalize_platform,
+                    policy.conditions.platform_conditions.include_platforms,
+                )
+                if normalized_platform
+            }
+            excluded_platforms = {
+                normalized_platform
+                for normalized_platform in map(
+                    self._normalize_platform,
+                    policy.conditions.platform_conditions.exclude_platforms,
+                )
+                if normalized_platform
+            }
+
+            if "all" not in included_platforms:
                 continue
 
-            if not KNOWN_PLATFORMS.issubset(
-                set(policy.conditions.platform_conditions.excluded_platforms)
-            ):
+            if not {
+                self._normalize_platform(platform) for platform in KNOWN_PLATFORMS
+            }.issubset(excluded_platforms):
                 continue
 
             if (
diff --git a/prowler/providers/m365/services/entra/entra_service.py b/prowler/providers/m365/services/entra/entra_service.py
index 56195587bb..3c9b64b775 100644
--- a/prowler/providers/m365/services/entra/entra_service.py
+++ b/prowler/providers/m365/services/entra/entra_service.py
@@ -9,7 +9,7 @@ from msgraph.generated.models.o_data_errors.o_data_error import ODataError
 from msgraph.generated.security.microsoft_graph_security_run_hunting_query.run_hunting_query_post_request_body import (
     RunHuntingQueryPostRequestBody,
 )
-from pydantic.v1 import BaseModel
+from pydantic.v1 import BaseModel, Field
 
 from prowler.lib.logger import logger
 from prowler.providers.m365.lib.service.service import M365Service
@@ -823,8 +823,15 @@ class ClientAppType(Enum):
 class PlatformConditions(BaseModel):
     """Model representing device platform conditions for Conditional Access policies."""
 
-    included_platforms: List[str] = []
-    excluded_platforms: List[str] = []
+    include_platforms: List[str] = Field(
+        default_factory=list, alias="included_platforms"
+    )
+    exclude_platforms: List[str] = Field(
+        default_factory=list, alias="excluded_platforms"
+    )
+
+    class Config:
+        allow_population_by_field_name = True
 
 
 class Conditions(BaseModel):
diff --git a/tests/providers/m365/services/entra/entra_conditional_access_policy_unknown_device_blocked/entra_conditional_access_policy_unknown_device_blocked_test.py b/tests/providers/m365/services/entra/entra_conditional_access_policy_unknown_device_blocked/entra_conditional_access_policy_unknown_device_blocked_test.py
index 7c5b6c3eae..9f10c15cc2 100644
--- a/tests/providers/m365/services/entra/entra_conditional_access_policy_unknown_device_blocked/entra_conditional_access_policy_unknown_device_blocked_test.py
+++ b/tests/providers/m365/services/entra/entra_conditional_access_policy_unknown_device_blocked/entra_conditional_access_policy_unknown_device_blocked_test.py
@@ -19,7 +19,7 @@ from tests.providers.m365.m365_fixtures import DOMAIN, set_mocked_m365_provider
 
 CHECK_MODULE_PATH = "prowler.providers.m365.services.entra.entra_conditional_access_policy_unknown_device_blocked.entra_conditional_access_policy_unknown_device_blocked"
 
-KNOWN_PLATFORMS = ["android", "iOS", "windows", "macOS", "linux"]
+KNOWN_PLATFORMS = ["android", "ios", "windows", "macos", "linux"]
 
 
 def _default_session_controls():
@@ -51,7 +51,7 @@ def _default_conditions(**overrides):
         ),
         client_app_types=[],
         platform_conditions=PlatformConditions(
-            included_platforms=["all"],
+            included_platforms=["All"],
             excluded_platforms=KNOWN_PLATFORMS,
         ),
         user_risk_levels=[],
@@ -286,7 +286,7 @@ class Test_entra_conditional_access_policy_unknown_device_blocked:
                     display_name=display_name,
                     conditions=_default_conditions(
                         platform_conditions=PlatformConditions(
-                            included_platforms=["android", "iOS"],
+                            included_platforms=["android", "ios"],
                             excluded_platforms=[],
                         )
                     ),
@@ -337,8 +337,8 @@ class Test_entra_conditional_access_policy_unknown_device_blocked:
                     display_name=display_name,
                     conditions=_default_conditions(
                         platform_conditions=PlatformConditions(
-                            included_platforms=["all"],
-                            excluded_platforms=["android", "iOS", "windows"],
+                            included_platforms=["All"],
+                            excluded_platforms=["android", "ios", "windows"],
                         )
                     ),
                     grant_controls=_default_grant_controls(),