diff --git a/transforms/csdl/preprocess_csdl.xsl b/transforms/csdl/preprocess_csdl.xsl
index 8455789ad..6c674c84d 100644
--- a/transforms/csdl/preprocess_csdl.xsl
+++ b/transforms/csdl/preprocess_csdl.xsl
@@ -669,6 +669,8 @@
     <!-- This should be a temp fix, tracking: https://github.com/microsoft/OpenAPI.NET.OData/issues/582 -->
     <xsl:template match="edm:Schema[@Namespace='microsoft.graph']/edm:Action[@Name='verify']/edm:Parameter[@Name='forceTakeover']"/>
 
+    <xsl:template match="edm:Schema[@Namespace='microsoft.graph.security']/edm:Action[@Name='estimateStatistics']/edm:Parameter[@Name='statisticsOptions']"/>
+
     <!-- Remove action parameters -->
     <!-- This should be a temp fix, tracking: https://github.com/microsoftgraph/MSGraph-SDK-Code-Generator/issues/261 -->
     <!-- <xsl:template match="edm:Schema[@Namespace='microsoft.graph']/edm:Action[@Name='createUploadSession']/edm:Parameter[@Name='deferCommit']"/> -->
diff --git a/transforms/csdl/preprocess_csdl_test_input.xml b/transforms/csdl/preprocess_csdl_test_input.xml
index 759c3cb42..e367bc509 100644
--- a/transforms/csdl/preprocess_csdl_test_input.xml
+++ b/transforms/csdl/preprocess_csdl_test_input.xml
@@ -651,5 +651,23 @@
                 <Annotation Term="Org.OData.Capabilities.V1.SkipSupported" Bool="false" />
             </Annotations>
         </Schema>
+        <Schema Namespace="microsoft.graph.security" xmlns="http://docs.oasis-open.org/odata/ns/edm">
+            <EnumType Name="statisticsOptions" IsFlags="true">
+                <Member Name="includeRefiners" Value="1" />
+                <Member Name="includeQueryStats" Value="2" />
+                <Member Name="includeUnindexedStats" Value="4" />
+                <Member Name="advancedIndexing" Value="8" />
+                <Member Name="locationsWithoutHits" Value="16" />
+                <Member Name="unknownFutureValue" Value="32" />
+            </EnumType>
+            <EntityType Name="ediscoverySearch">
+                <Property Name="dummyProperty" Type="string" />
+                <!--  this is partial since we only need the entity type for the action-->
+            </EntityType>
+            <Action Name="estimateStatistics" IsBound="true">
+                <Parameter Name="bindingParameter" Type="microsoft.graph.security.ediscoverySearch" />
+                <Parameter Name="statisticsOptions" Type="microsoft.graph.security.statisticsOptions" />
+            </Action>
+        </Schema>
     </edmx:DataServices>
 </edmx:Edmx>
diff --git a/transforms/csdl/preprocess_csdl_test_output.xml b/transforms/csdl/preprocess_csdl_test_output.xml
index 042be8379..fd2ae0f63 100644
--- a/transforms/csdl/preprocess_csdl_test_output.xml
+++ b/transforms/csdl/preprocess_csdl_test_output.xml
@@ -1677,5 +1677,22 @@
         </Annotation>
       </Annotations>
     </Schema>
+    <Schema Namespace="microsoft.graph.security" xmlns="http://docs.oasis-open.org/odata/ns/edm">
+      <EnumType Name="statisticsOptions" IsFlags="true">
+        <Member Name="includeRefiners" Value="1" />
+        <Member Name="includeQueryStats" Value="2" />
+        <Member Name="includeUnindexedStats" Value="4" />
+        <Member Name="advancedIndexing" Value="8" />
+        <Member Name="locationsWithoutHits" Value="16" />
+        <Member Name="unknownFutureValue" Value="32" />
+      </EnumType>
+      <EntityType Name="ediscoverySearch">
+        <Property Name="dummyProperty" Type="string" />
+        <!--  this is partial since we only need the entity type for the action-->
+      </EntityType>
+      <Action Name="estimateStatistics" IsBound="true">
+        <Parameter Name="bindingParameter" Type="microsoft.graph.security.ediscoverySearch" />
+      </Action>
+    </Schema>
   </edmx:DataServices>
 </edmx:Edmx>
\ No newline at end of file