diff --git a/.pipelines/OneBranch.Official.yml b/.pipelines/OneBranch.Official.yml
index 56fada628..996f2a607 100644
--- a/.pipelines/OneBranch.Official.yml
+++ b/.pipelines/OneBranch.Official.yml
@@ -57,8 +57,6 @@ extends:
           BuildConfiguration: $(BuildConfiguration)
           BuildVersion: $(BuildVersion)
           OfficialBuild: true
-          ob_sdl_prefast_enabled: true
-          ob_sdl_prefast_runDuring: "Guardian" # Enabling PreFast only for build stage
 
     - stage: vpack
       dependsOn: build
@@ -68,7 +66,6 @@ extends:
             type: windows
           variables:
             ob_outputDirectory: '$(Build.SourcesDirectory)\out'
-
             ob_createvpack_enabled: true
             ob_createvpack_packagename: CppWinRT.Compiler
             ob_createvpack_owneralias: cpp4uwpt
diff --git a/.pipelines/jobs/OneBranchBuild.yml b/.pipelines/jobs/OneBranchBuild.yml
index b5c060cb9..dfee85edf 100644
--- a/.pipelines/jobs/OneBranchBuild.yml
+++ b/.pipelines/jobs/OneBranchBuild.yml
@@ -32,7 +32,7 @@ jobs:
       ob_sdl_codeSignValidation_excludes: '-|**\*.exe;-|**\*.dll' 
 
     ob_sdl_prefast_enabled: true
-    ob_sdl_prefast_runDuring: 'Build'
+    ob_sdl_prefast_runDuring: "Guardian"
     ob_sdl_checkCompliantCompilerWarnings: true
     
     ob_symbolsPublishing_enabled: ${{ parameters.OfficialBuild }}