diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index fd50bbd..2f5a54c 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -23,6 +23,8 @@ extends:
             inputs:
               version: 24.x
 
+          - template: /eng/common/pipelines/templates/steps/create-authenticated-npmrc.yml
+  
           - script: npm ci
             displayName: 'npm ci'
 
diff --git a/eng/1es-redirect.yml b/eng/1es-redirect.yml
index ee863a7..463c9cc 100644
--- a/eng/1es-redirect.yml
+++ b/eng/1es-redirect.yml
@@ -36,6 +36,7 @@ extends:
         - 1ES.PT.Tag-refs/tags/canary
     settings:
       skipBuildTagsForGitHubPullRequests: true
+      networkIsolationPolicy: Permissive, CFSClean
     sdl:
       git:
         longpaths: true
diff --git a/eng/common/pipelines/templates/steps/create-authenticated-npmrc.yml b/eng/common/pipelines/templates/steps/create-authenticated-npmrc.yml
new file mode 100644
index 0000000..3fa699b
--- /dev/null
+++ b/eng/common/pipelines/templates/steps/create-authenticated-npmrc.yml
@@ -0,0 +1,41 @@
+parameters:
+  - name: npmrcPath
+    type: string
+    # When empty, defaults to the agent user's .npmrc ($HOME/.npmrc on
+    # Linux/macOS, %USERPROFILE%\.npmrc on Windows) so every subsequent
+    # npm / pnpm / npx call in the job inherits the registry + auth.
+    default: ""
+  - name: registryUrl
+    type: string
+    default: "https://pkgs.dev.azure.com/azure-sdk/public/_packaging/azure-sdk-for-js/npm/registry/"
+  - name: CustomCondition
+    type: string
+    default: succeeded()
+  - name: ServiceConnection
+    type: string
+    default: ""
+
+steps:
+  - pwsh: |
+      $npmrcPath = '${{ parameters.npmrcPath }}'
+      if (-not $npmrcPath) { $npmrcPath = Join-Path $HOME '.npmrc' }
+
+      Write-Host "Creating .npmrc file $npmrcPath for registry ${{ parameters.registryUrl }}"
+      $parentFolder = Split-Path -Path $npmrcPath -Parent
+
+      if ($parentFolder -and -not (Test-Path $parentFolder)) {
+        Write-Host "Creating folder $parentFolder"
+        New-Item -Path $parentFolder -ItemType Directory | Out-Null
+      }
+
+      "registry=${{ parameters.registryUrl }}" | Out-File $npmrcPath
+      Write-Host "##vso[task.setvariable variable=resolvedNpmrcPath]$npmrcPath"
+    displayName: "Create .npmrc"
+    condition: ${{ parameters.CustomCondition }}
+
+  - task: npmAuthenticate@0
+    displayName: Authenticate .npmrc
+    condition: ${{ parameters.CustomCondition }}
+    inputs:
+      workingFile: $(resolvedNpmrcPath)
+      azureDevOpsServiceConnection: ${{ parameters.ServiceConnection }}
diff --git a/eng/test-steps.yml b/eng/test-steps.yml
index d84fbac..7594e6e 100644
--- a/eng/test-steps.yml
+++ b/eng/test-steps.yml
@@ -8,6 +8,8 @@ steps:
     inputs:
       version: ${{ parameters.version }}
 
+  - template: /eng/common/pipelines/templates/steps/create-authenticated-npmrc.yml
+
   - script: npm ci
     displayName: 'npm ci'