diff --git a/.github/workflows/acceptance.yml b/.github/workflows/acceptance.yml
index bf209e39..ea9a8a1f 100644
--- a/.github/workflows/acceptance.yml
+++ b/.github/workflows/acceptance.yml
@@ -11,6 +11,8 @@ permissions:
 jobs:
   acceptance:
     runs-on: ubuntu-latest
+    env:
+      NPM_CONFIG_REGISTRY: ${{ vars.CFS_NPM_REGISTRY || 'https://packagefeedproxy.microsoft.io/npm/' }}
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # pin@v7.0.0
         with:
diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index 4d2a1da8..e5092dda 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -6,6 +6,8 @@ on: workflow_dispatch
 jobs:
   copilot-setup-steps:
     runs-on: ubuntu-latest
+    env:
+      NPM_CONFIG_REGISTRY: ${{ vars.CFS_NPM_REGISTRY || 'https://packagefeedproxy.microsoft.io/npm/' }}
     # Set the permissions to the lowest permissions possible needed for *your steps*. Copilot will be given its own token for its operations.
     permissions:
       # If you want to clone the repository as part of your setup steps, for example to install dependencies, you'll need the `contents: read` permission. If you don't clone the repository in your setup steps, Copilot will do this for you automatically after the steps complete.
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 168616df..df59f261 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -11,6 +11,8 @@ permissions:
 jobs:
   lint:
     runs-on: ubuntu-latest
+    env:
+      NPM_CONFIG_REGISTRY: ${{ vars.CFS_NPM_REGISTRY || 'https://packagefeedproxy.microsoft.io/npm/' }}
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # pin@v7.0.0
         with:
diff --git a/.github/workflows/package-check.yml b/.github/workflows/package-check.yml
index 5e86c8e4..c5b42564 100644
--- a/.github/workflows/package-check.yml
+++ b/.github/workflows/package-check.yml
@@ -13,6 +13,8 @@ permissions:
 jobs:
   package-check:
     runs-on: ubuntu-latest
+    env:
+      NPM_CONFIG_REGISTRY: ${{ vars.CFS_NPM_REGISTRY || 'https://packagefeedproxy.microsoft.io/npm/' }}
 
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # pin@v7.0.0
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fa83e5fa..ce24beca 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -18,6 +18,7 @@ jobs:
       contents: write
       id-token: write
     env:
+      NPM_CONFIG_REGISTRY: ${{ vars.CFS_NPM_REGISTRY || 'https://packagefeedproxy.microsoft.io/npm/' }}
       ATTESTED_FILES: |-
         action.yml
         dist/index.js
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 812d7073..bc26057d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,6 +11,8 @@ permissions:
 jobs:
   test:
     runs-on: ubuntu-latest
+    env:
+      NPM_CONFIG_REGISTRY: ${{ vars.CFS_NPM_REGISTRY || 'https://packagefeedproxy.microsoft.io/npm/' }}
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # pin@v7.0.0
         with:
diff --git a/.npmrc b/.npmrc
index 0171db74..1c3b2f3d 100644
--- a/.npmrc
+++ b/.npmrc
@@ -1 +1,2 @@
+registry=https://packagefeedproxy.microsoft.io/npm/
 min-release-age=10