diff --git a/eng/Signing.props b/eng/Signing.props
index ce4e6c1ace14..ac7cbc90cc5f 100644
--- a/eng/Signing.props
+++ b/eng/Signing.props
@@ -25,6 +25,15 @@
     <FileSignInfo Include="SegoeUI-Semibold.ttf" CertificateName="3PartyScriptsSHA2" />
   </ItemGroup>
 
+  <ItemGroup Label="Microsoft files">
+    <FileSignInfo Include="ReconnectModal.razor.js" CertificateName="Microsoft400" />
+  </ItemGroup>
+
+  <ItemGroup Label="MSI workload cab signing">
+    <!-- Sign cab files embedded inside MSI workload packs -->
+    <FileExtensionSignInfo Include=".cab" CertificateName="Microsoft400" />
+  </ItemGroup>
+
   <ItemGroup>
     <ItemsToSign Include="$(ArtifactsShippingPackagesDir)\**\*.msi" Condition="'$(PostBuildSign)' != 'true'" />
     <ItemsToSign Include="$(ArtifactsShippingPackagesDir)**\*.wixpack.zip" Condition="'$(PostBuildSign)' != 'true'" />
@@ -32,4 +41,4 @@
     <ItemsToSign Include="$(ArtifactsShippingPackagesDir)\**\*.zip" Condition="'$(PostBuildSign)' != 'true'" />
     <ItemsToSignPostBuild Include="$(ArtifactsShippingPackagesDir)\**\*.zip" Condition="'$(PostBuildSign)' == 'true'" />
   </ItemGroup>
-</Project>   
+</Project>