Backport NugetAudit settings (#3318)

Author: benrr101

src/Directory.Build.props

@@ -67,8 +67,18 @@
   <PropertyGroup Condition="'$(BuildSimulator)' == 'true'">
     <DefineConstants>$(DefineConstants);ENCLAVE_SIMULATOR</DefineConstants>
   </PropertyGroup>
-
-  <!-- Audit Settings -->
+  
+  <!-- NuGet Audit Settings -->
+  <PropertyGroup Condition="'$(TF_BUILD)' == 'true'">
+    <!--
+      ADO does not support audit/vulnerability feeds, so the audit feed is specified (in
+      nuget.config) as nuget.org. OneBranch default network isolation does not allow connections
+      to nuget.org. To avoid this issue, we will disable auditing for official builds, but leave it
+      enabled for local builds.
+      @TODO: If/when auditing is enabled for central feeds services, this can be removed. 
+    -->
+    <NuGetAudit>false</NuGetAudit>
+  </PropertyGroup>
   <PropertyGroup>
     <NuGetAuditMode>all</NuGetAuditMode>
   </PropertyGroup>