diff --git a/eng/pipelines/templates/BuildAndTest.yml b/eng/pipelines/templates/BuildAndTest.yml
index f8309057b92..ce540adfa24 100644
--- a/eng/pipelines/templates/BuildAndTest.yml
+++ b/eng/pipelines/templates/BuildAndTest.yml
@@ -170,13 +170,6 @@ steps:
     - pwsh: |
           $(Build.SourcesDirectory)/src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript/azure-devops-report/build.ps1 -OutputPath $(Build.Arcade.VSIXOutputPath)
       displayName: Build Azure DevOps plugin
-      env:
-        # Some CI agents have stale npm auth tokens in the user-level .npmrc
-        # (e.g. C:\Users\cloudtest\.npmrc). npm sends these stale credentials
-        # to the public dotnet-public-npm feed, causing E401 errors. Override
-        # the user config path to a non-existent file so npm ignores stale
-        # credentials and uses anonymous access for the public feed.
-        NPM_CONFIG_USERCONFIG: $(Agent.TempDirectory)/.npmrc-not-exists
 
     - script: ${{ parameters.buildScript }}
               -restore
diff --git a/src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript/azure-devops-report/build.ps1 b/src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript/azure-devops-report/build.ps1
index 23d623f9491..80c6ee709ea 100644
--- a/src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript/azure-devops-report/build.ps1
+++ b/src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript/azure-devops-report/build.ps1
@@ -21,6 +21,13 @@ if ($null -eq $PackageVersion)
 
 Write-Host "Using version $PackageVersion"
 
+# Some CI agents have stale npm auth tokens in user or global .npmrc files
+# (e.g. C:\Users\cloudtest\.npmrc) that cause E401 errors against the public
+# dotnet-public-npm feed. Override both config paths so npm ignores stale
+# agent-level credentials and accesses the public feed anonymously.
+$env:NPM_CONFIG_USERCONFIG = "$env:TEMP\no-user-npmrc"
+$env:NPM_CONFIG_GLOBALCONFIG = "$env:TEMP\no-global-npmrc"
+
 # Write-Information "Building Report Publishing task"
 Set-Location $PSScriptRoot/tasks/PublishAIEvaluationReport
 npm ci --omit=dev