diff --git a/.azure-pipelines/azure-pipelines-Official.yml b/.azure-pipelines/azure-pipelines-Official.yml
index a5a08167ca1d..56d88751f690 100644
--- a/.azure-pipelines/azure-pipelines-Official.yml
+++ b/.azure-pipelines/azure-pipelines-Official.yml
@@ -14,7 +14,7 @@ schedules:
     - 202012
   always: true
 
-pool: sonicbld
+pool: sonicbld-1es
 
 stages:
 - stage: Build
diff --git a/.azure-pipelines/azure-pipelines-UpgrateVersion.yml b/.azure-pipelines/azure-pipelines-UpgrateVersion.yml
index 1caf9f8aaa8d..907307b9cb31 100644
--- a/.azure-pipelines/azure-pipelines-UpgrateVersion.yml
+++ b/.azure-pipelines/azure-pipelines-UpgrateVersion.yml
@@ -22,7 +22,7 @@ resources:
     ref: master
     endpoint: sonic-net
 
-pool: sonicbld
+pool: sonicbld-1es
 
 parameters:
   - name: jobFilters
diff --git a/.azure-pipelines/build-template.yml b/.azure-pipelines/build-template.yml
index 7b5ec1ed2757..4f2d5f989fbe 100644
--- a/.azure-pipelines/build-template.yml
+++ b/.azure-pipelines/build-template.yml
@@ -35,9 +35,9 @@ parameters:
 - name: pool
   type: string
   values:
-  - sonicbld
+  - sonicbld-1es
   - sonicbld_8c
-  default: sonicbld
+  default: sonicbld-1es
 
 - name: dbg_image
   type: boolean
diff --git a/.azure-pipelines/docker-sonic-mgmt.yml b/.azure-pipelines/docker-sonic-mgmt.yml
index 4dc9aee9bb89..de6c3cf8e343 100644
--- a/.azure-pipelines/docker-sonic-mgmt.yml
+++ b/.azure-pipelines/docker-sonic-mgmt.yml
@@ -32,7 +32,7 @@ stages:
 - stage: Build
   jobs:
   - job: Build
-    pool: sonicbld
+    pool: sonicbld-1es
     timeoutInMinutes: 360
     steps:
     - template: cleanup.yml
diff --git a/.azure-pipelines/docker-sonic-slave.yml b/.azure-pipelines/docker-sonic-slave.yml
index 16471368be3e..4e45c30ff001 100644
--- a/.azure-pipelines/docker-sonic-slave.yml
+++ b/.azure-pipelines/docker-sonic-slave.yml
@@ -62,7 +62,7 @@ stages:
       - ${{ each arch in parameters.arches }}:
         - template: .azure-pipelines/docker-sonic-slave-template.yml@buildimage
           parameters:
-            pool: sonicbld
+            pool: sonicbld-1es
             arch: ${{ arch }}
             dist: ${{ dist }}
             ${{ if ne(arch, 'amd64') }}:
diff --git a/.azure-pipelines/dpkg-cache-cleanup.yml b/.azure-pipelines/dpkg-cache-cleanup.yml
index 2789d1818819..52b0e866a6c7 100644
--- a/.azure-pipelines/dpkg-cache-cleanup.yml
+++ b/.azure-pipelines/dpkg-cache-cleanup.yml
@@ -16,7 +16,7 @@ pr: none
 
 jobs:
 - job: Build
-  pool: sonicbld
+  pool: sonicbld-1es
   timeoutInMinutes: 5
   steps:
   - checkout: none
diff --git a/.azure-pipelines/official-build.yml b/.azure-pipelines/official-build.yml
index 2e96d2899e71..80276490f69e 100644
--- a/.azure-pipelines/official-build.yml
+++ b/.azure-pipelines/official-build.yml
@@ -28,7 +28,7 @@ variables:
 
 stages:
 - stage: Build
-  pool: sonicbld
+  pool: sonicbld-1es
   variables:
     CACHE_MODE: wcache
     ${{ if eq(variables['Build.SourceBranchName'], '202012') }}:
diff --git a/.azure-pipelines/template-commonlib.yml b/.azure-pipelines/template-commonlib.yml
index cd7551d83823..c821998ae815 100644
--- a/.azure-pipelines/template-commonlib.yml
+++ b/.azure-pipelines/template-commonlib.yml
@@ -11,7 +11,7 @@ jobs:
   - job: Build_${{ arch }}
     timeoutInMinutes: 120
     ${{ if eq(arch,'amd64') }}:
-      pool: sonicbld
+      pool: sonicbld-1es
     ${{ else }}:
       pool: sonicbld-${{ arch }}
     variables:
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 96bd6bd22c6e..15d24e3418ba 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -44,7 +44,7 @@ variables:
 
 stages:
 - stage: BuildVS
-  pool: sonicbld
+  pool: sonicbld-1es
   variables:
     CACHE_MODE: rcache
     VERSION_CONTROL_OPTIONS: 'SONIC_VERSION_CONTROL_COMPONENTS=deb,py2,py3,web,git,docker'
@@ -56,7 +56,7 @@ stages:
       - name: vs
 
 - stage: Build
-  pool: sonicbld
+  pool: sonicbld-1es
   dependsOn: []
   variables:
     CACHE_MODE: rcache
@@ -134,9 +134,9 @@ stages:
         testRunTitle: vstest
 
   - job: t0_elastictest
-    pool: ubuntu-20.04
+    pool: sonic-ubuntu-1c
     displayName: "kvmtest-t0 by Elastictest"
-    timeoutInMinutes: 240
+    timeoutInMinutes: 400
     continueOnError: false
     steps:
     - template: .azure-pipelines/run-test-elastictest-template.yml@sonic-mgmt
@@ -147,9 +147,9 @@ stages:
         MGMT_BRANCH: "202012"
 
   - job: t0_2vlans_elastictest
-    pool: ubuntu-20.04
+    pool: sonic-ubuntu-1c
     displayName: "kvmtest-t0-2vlans by Elastictest"
-    timeoutInMinutes: 240
+    timeoutInMinutes: 400
     continueOnError: false
     steps:
     - template: .azure-pipelines/run-test-elastictest-template.yml@sonic-mgmt
@@ -162,9 +162,9 @@ stages:
         MGMT_BRANCH: "202012"
 
   - job: t1_lag_elastictest
-    pool: ubuntu-20.04
+    pool: sonic-ubuntu-1c
     displayName: "kvmtest-t1-lag by Elastictest"
-    timeoutInMinutes: 240
+    timeoutInMinutes: 400
     continueOnError: false
     steps:
     - template: .azure-pipelines/run-test-elastictest-template.yml@sonic-mgmt
@@ -175,9 +175,9 @@ stages:
         MGMT_BRANCH: "202012"
 
   - job: dualtor_elastictest
-    pool: ubuntu-20.04
+    pool: sonic-ubuntu-1c
     displayName: "kvmtest-dualtor-t0 by Elastictest"
-    timeoutInMinutes: 240
+    timeoutInMinutes: 400
     continueOnError: false
     steps:
       - template: .azure-pipelines/run-test-elastictest-template.yml@sonic-mgmt