diff --git a/.github/workflows/localization.yml b/.github/workflows/localization.yml
index 740d7ef9b..21c5a53e4 100644
--- a/.github/workflows/localization.yml
+++ b/.github/workflows/localization.yml
@@ -1,5 +1,10 @@
 on: workflow_dispatch
 
+permissions:
+  id-token: write
+  contents: write
+  pull-requests: write
+
 jobs:
   Localize:
     runs-on: ubuntu-22.04
@@ -7,12 +12,40 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+
+    - name: Get access token for TouchDown Build
+      id: get-token
+      run: |
+          # 1. Get the GitHub OIDC federated token
+          FEDERATED_TOKEN=$(curl -s -H "Authorization: bearer $ACTIONS_ID_TOKEN_REQUEST_TOKEN" \
+            "$ACTIONS_ID_TOKEN_REQUEST_URL&audience=api://AzureADTokenExchange" | jq -r '.value')
+          
+          # 2. Exchange it for a TouchDown Build access token (v2.0 endpoint)
+          RESPONSE=$(curl -s -X POST \
+          "https://login.microsoftonline.com/${{ secrets.AZURE_TENANT_ID }}/oauth2/v2.0/token" \
+            -H "Content-Type: application/x-www-form-urlencoded" \
+            -d "client_id=${{ secrets.AZURE_CLIENT_ID }}" \
+            -d "scope=https://prdtrs01.onmicrosoft.com/touchdownbuildservice_prod/.default" \
+            -d "client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer" \
+            -d "client_assertion=$FEDERATED_TOKEN" \
+            -d "grant_type=client_credentials")
+          
+          TOKEN=$(echo "$RESPONSE" | jq -r '.access_token')
+          
+          if [ "$TOKEN" = "null" ] || [ -z "$TOKEN" ]; then
+            echo "ERROR: Failed to get access token"
+            echo "$RESPONSE" | jq .
+            exit 1
+          fi
+          
+          echo "::add-mask::$TOKEN"
+          echo "TD_ACCESS_TOKEN=$TOKEN" >> "$GITHUB_ENV"
+          echo "Token acquired successfully (length: ${#TOKEN})"
     - shell: bash
       name: Localize
       env:
         TDBUILD_TEAM_ID: ${{ secrets.TDBUILD_TEAM_ID }}
-        TDBUILD_AAD_APPLICATION_CLIENT_ID: ${{ secrets.TDBUILD_AAD_APPLICATION_CLIENT_ID }}
-        TDBUILD_AAD_APPLICATION_CLIENT_SECRET: ${{ secrets.TDBUILD_AAD_APPLICATION_CLIENT_SECRET }}
+        TD_ACCESS_TOKEN: ${{ env.TD_ACCESS_TOKEN }}
       run: ./localize.sh
     - name: Create Pull Request
       env:
diff --git a/GetLocalizedFiles.sh b/GetLocalizedFiles.sh
index c4235c0a3..72c730e87 100755
--- a/GetLocalizedFiles.sh
+++ b/GetLocalizedFiles.sh
@@ -64,10 +64,9 @@ jsonParseCmd=`awk -F"[,:}]" '{for(i=1;i<=NF;i++){if($i~/'$KEY'\042/){print $(i+1
 echo $jsonParseCmd
 }
 
-function oauthToken() {
-tokenFetchCmd=`curl -sw "%{http_code}" -X POST -H "Content-Type: application/x-www-form-urlencoded" -d "client_id=$alias&resource=https://microsoft.onmicrosoft.com/$tokenServer&client_secret=$password&grant_type=client_credentials" "https://login.microsoftonline.com/microsoft.onmicrosoft.com/oauth2/token"`
-tokenValue=`echo $tokenFetchCmd | jsonValue access_token 1`
-echo $tokenValue
+function oauthToken ()
+{
+  echo "$alias"
 }
 
 if [ -d $filePath ]; then
@@ -155,7 +154,7 @@ then
   echo "Deleting values-$folderWithoutTrailingSlash from ${resDir} as it already exists"
   rm -r "${resDir}/values-${folderWithoutTrailingSlash}"
 fi
- 
+
 mv $folder "${outputDirectory}/values-${folderWithoutTrailingSlash}"
 mv ${valuesDir}/values-${folderWithoutTrailingSlash} $resDir
 
diff --git a/localize.sh b/localize.sh
index 39ed4d6ac..e70ea8ebd 100755
--- a/localize.sh
+++ b/localize.sh
@@ -6,32 +6,27 @@ if [ -z $TDBUILD_TEAM_ID ]; then
     read TDBUILD_TEAM_ID
 fi
 
-if [ -z $TDBUILD_AAD_APPLICATION_CLIENT_ID ]; then
-    printf "Alias: "
-    read TDBUILD_AAD_APPLICATION_CLIENT_ID
+if [ -z "$TD_ACCESS_TOKEN" ]; then
+  echo "ERROR: TD_ACCESS_TOKEN is not set. Run azure/login first."
+  exit 1
 fi
 
-if [ -z $TDBUILD_AAD_APPLICATION_CLIENT_SECRET ]; then
-    stty -echo
-    printf "Password: "
-    read TDBUILD_AAD_APPLICATION_CLIENT_SECRET
-    stty echo
-    printf "\n"
-fi
+echo "Using Team ID: $TDBUILD_TEAM_ID"
+echo "Using pre-fetched OIDC token (length: ${#TD_ACCESS_TOKEN})"
 
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f FluentUI.Demo/src/main/res/values -r demo -o FluentUI.Demo/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_calendar/src/main/res/values -r fluentui_calendar -o fluentui_calendar/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_ccb/src/main/res/values -r fluentui_ccb -o fluentui_ccb/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_controls/src/main/res/values -r fluentui_controls -o fluentui_controls/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_core/src/main/res/values -r fluentui_core -o fluentui_core/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_drawer/src/main/res/values -r fluentui_drawer -o fluentui_drawer/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_listitem/src/main/res/values -r fluentui_listitem -o fluentui_listitem/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_menus/src/main/res/values -r fluentui_menus -o fluentui_menus/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_notification/src/main/res/values -r fluentui_notification -o fluentui_notification/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_others/src/main/res/values -r fluentui_others -o fluentui_others/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_peoplepicker/src/main/res/values -r fluentui_peoplepicker -o fluentui_peoplepicker/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_persona/src/main/res/values -r fluentui_persona -o fluentui_persona/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_progress/src/main/res/values -r fluentui_progress -o fluentui_progress/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_tablayout/src/main/res/values -r fluentui_tablayout -o fluentui_tablayout/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_topappbars/src/main/res/values -r fluentui_topappbars -o fluentui_topappbars/src/main/res/values
-./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TDBUILD_AAD_APPLICATION_CLIENT_ID -p $TDBUILD_AAD_APPLICATION_CLIENT_SECRET -f fluentui_transients/src/main/res/values -r fluentui_transients -o fluentui_transients/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f FluentUI.Demo/src/main/res/values -r demo -o FluentUI.Demo/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_calendar/src/main/res/values -r fluentui_calendar -o fluentui_calendar/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_ccb/src/main/res/values -r fluentui_ccb -o fluentui_ccb/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_controls/src/main/res/values -r fluentui_controls -o fluentui_controls/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_core/src/main/res/values -r fluentui_core -o fluentui_core/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_drawer/src/main/res/values -r fluentui_drawer -o fluentui_drawer/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_listitem/src/main/res/values -r fluentui_listitem -o fluentui_listitem/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_menus/src/main/res/values -r fluentui_menus -o fluentui_menus/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_notification/src/main/res/values -r fluentui_notification -o fluentui_notification/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_others/src/main/res/values -r fluentui_others -o fluentui_others/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_peoplepicker/src/main/res/values -r fluentui_peoplepicker -o fluentui_peoplepicker/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_persona/src/main/res/values -r fluentui_persona -o fluentui_persona/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_progress/src/main/res/values -r fluentui_progress -o fluentui_progress/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_tablayout/src/main/res/values -r fluentui_tablayout -o fluentui_tablayout/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_topappbars/src/main/res/values -r fluentui_topappbars -o fluentui_topappbars/src/main/res/values
+./GetLocalizedFiles.sh -t $TDBUILD_TEAM_ID -u -a $TD_ACCESS_TOKEN -f fluentui_transients/src/main/res/values -r fluentui_transients -o fluentui_transients/src/main/res/values