diff --git a/tools/devops/automation/build-pipeline.yml b/tools/devops/automation/build-pipeline.yml
index 09f588d9d0c..f5803496e9c 100644
--- a/tools/devops/automation/build-pipeline.yml
+++ b/tools/devops/automation/build-pipeline.yml
@@ -132,7 +132,7 @@ extends:
           forceInsertion: ${{ parameters.forceInsertion }}
           pushNugets: ${{ parameters.pushNugets }}
           pushNugetsToMaestro: ${{ parameters.pushNugetsToMaestro }}
-          useACES: true  # flip to false to opt CI out of ACES; see templates/variables/common.yml
+          useACES: false  # flip to true to opt CI into ACES; see templates/variables/common.yml
 
       - template: localization/v1.yml@yaml-templates
         parameters:
diff --git a/tools/devops/automation/build-pull-request.yml b/tools/devops/automation/build-pull-request.yml
index cc30c3acf9a..ebe79c81777 100644
--- a/tools/devops/automation/build-pull-request.yml
+++ b/tools/devops/automation/build-pull-request.yml
@@ -113,4 +113,4 @@ extends:
         forceInsertion: ${{ parameters.forceInsertion }}
         pushNugets: false
         pushNugetsToMaestro: false
-        useACES: false  # flip to true to opt PR into ACES; see templates/variables/common.yml
+        useACES: true  # flip to false to opt PR out of ACES; see templates/variables/common.yml
diff --git a/tools/devops/automation/run-ci-api-diff.yml b/tools/devops/automation/run-ci-api-diff.yml
index caf428a3087..c2720b0063c 100644
--- a/tools/devops/automation/run-ci-api-diff.yml
+++ b/tools/devops/automation/run-ci-api-diff.yml
@@ -17,4 +17,4 @@ extends:
   parameters:
     isPR: false
     pool: $(CIBuildPool)
-    useACES: true  # flip to false to opt CI api-diff out of ACES; see templates/variables/common.yml
+    useACES: false  # flip to true to opt CI api-diff into ACES; see templates/variables/common.yml
diff --git a/tools/devops/automation/run-post-ci-build-tests.yml b/tools/devops/automation/run-post-ci-build-tests.yml
index f09d70d3e7b..bdcf48f0ed1 100644
--- a/tools/devops/automation/run-post-ci-build-tests.yml
+++ b/tools/devops/automation/run-post-ci-build-tests.yml
@@ -17,4 +17,4 @@ extends:
   template: templates/pipelines/run-tests-pipeline.yml
   parameters:
     isPR: false
-    useACES: true  # flip to false to opt CI simulator tests out of ACES; see templates/variables/common.yml
+    useACES: false  # flip to true to opt CI simulator tests into ACES; see templates/variables/common.yml
diff --git a/tools/devops/automation/run-post-pr-build-tests.yml b/tools/devops/automation/run-post-pr-build-tests.yml
index 81be17692d3..f3698a395f8 100644
--- a/tools/devops/automation/run-post-pr-build-tests.yml
+++ b/tools/devops/automation/run-post-pr-build-tests.yml
@@ -27,4 +27,4 @@ extends:
   parameters:
     isPR: true
     buildPackages: true
-    useACES: false  # flip to true to opt PR simulator tests into ACES; see templates/variables/common.yml
+    useACES: true  # flip to false to opt PR simulator tests out of ACES; see templates/variables/common.yml
diff --git a/tools/devops/automation/run-pr-api-diff.yml b/tools/devops/automation/run-pr-api-diff.yml
index 03f693b4b5e..272847abe4d 100644
--- a/tools/devops/automation/run-pr-api-diff.yml
+++ b/tools/devops/automation/run-pr-api-diff.yml
@@ -26,4 +26,4 @@ extends:
   parameters:
     isPR: true
     pool: $(PRBuildPool)
-    useACES: false  # flip to true to opt PR api-diff into ACES; see templates/variables/common.yml
+    useACES: true  # flip to false to opt PR api-diff out of ACES; see templates/variables/common.yml