diff --git a/.azure/pipelines/ci-unofficial.yml b/.azure/pipelines/ci-unofficial.yml
index e0b5a80f8f09..daa5311bdc27 100644
--- a/.azure/pipelines/ci-unofficial.yml
+++ b/.azure/pipelines/ci-unofficial.yml
@@ -75,7 +75,7 @@ variables:
     exclude:artifacts
 - template: /eng/common/templates-official/variables/pool-providers.yml@self
 
-esources:
+resources:
   repositories:
   # Repo: 1ESPipelineTemplates/1ESPipelineTemplates
   - repository: 1esPipelines
@@ -111,6 +111,9 @@ extends:
             jobName: Code_check
             jobDisplayName: Code check
             agentOs: Windows
+            beforeBuild:
+            - script: git submodule update --init
+              displayName: Update submodules
             steps:
             - powershell: ./eng/scripts/CodeCheck.ps1 -ci $(_InternalRuntimeDownloadArgs)
               displayName: Run eng/scripts/CodeCheck.ps1
@@ -127,6 +130,9 @@ extends:
           jobName: Windows_build
           jobDisplayName: "Build: Windows x64/x86/arm64"
           agentOs: Windows
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           steps:
           - ${{ if notIn(variables['Build.Reason'], 'PullRequest') }}:
             - script: echo "##vso[build.addbuildtag]daily-build"
@@ -258,6 +264,9 @@ extends:
           jobDisplayName: "Build: macOS arm64"
           agentOs: macOs
           timeoutInMinutes: 90
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           buildArgs:
             --arch arm64
             --pack
@@ -289,6 +298,9 @@ extends:
           jobDisplayName: "Build: macOS x64"
           agentOs: macOs
           timeoutInMinutes: 90
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           buildArgs:
             --pack
             --all
@@ -319,6 +331,9 @@ extends:
           jobDisplayName: "Build: Linux x64"
           agentOs: Linux
           useHostedUbuntu: false
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           buildArgs:
             --arch x64
             --pack
@@ -350,6 +365,9 @@ extends:
           jobName: Linux_arm_build
           jobDisplayName: "Build: Linux ARM"
           agentOs: Linux
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           buildArgs:
             --arch arm
             --pack
@@ -380,6 +398,9 @@ extends:
           jobName: Linux_arm64_build
           jobDisplayName: "Build: Linux ARM64"
           agentOs: Linux
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           buildArgs:
             --arch arm64
             --pack
@@ -412,6 +433,9 @@ extends:
           jobDisplayName: "Build: Linux Musl x64"
           agentOs: Linux
           container: azureLinux30Net10BuildAmd64
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           buildArgs:
             --arch x64
             --os-name linux-musl
@@ -446,6 +470,9 @@ extends:
           agentOs: Linux
           useHostedUbuntu: false
           container: azureLinux30Net10BuildAmd64
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           buildArgs:
             --arch arm
             --os-name linux-musl
@@ -479,6 +506,9 @@ extends:
           agentOs: Linux
           useHostedUbuntu: false
           container: azureLinux30Net10BuildAmd64
+          beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           buildArgs:
             --arch arm64
             --os-name linux-musl
@@ -517,6 +547,8 @@ extends:
                      /p:SkipIISExpressTests=true /p:SkipIISNewShimTests=true /p:RunBlazorPlaywrightTemplateTests=true /p:DoNotCleanUpTemplates=true
                      $(_InternalRuntimeDownloadArgs)
           beforeBuild:
+          - script: git submodule update --init
+            displayName: Update submodules
           - powershell: "& ./src/Servers/IIS/tools/UpdateIISExpressCertificate.ps1; & ./src/Servers/IIS/tools/update_schema.ps1"
             displayName: Setup IISExpress test certificates and schema
           artifacts:
@@ -540,6 +572,8 @@ extends:
             isAzDOTestingJob: true
             buildArgs: --all --test --binaryLog /p:RunTemplateTests=false /p:SkipHelixReadyTests=true $(_InternalRuntimeDownloadArgs)
             beforeBuild:
+            - script: git submodule update --init
+              displayName: Update submodules
             - bash: "./eng/scripts/install-nginx-mac.sh"
               displayName: Installing Nginx
             artifacts:
@@ -561,6 +595,8 @@ extends:
             useHostedUbuntu: false
             buildArgs: --all --test --binaryLog /p:RunTemplateTests=false /p:SkipHelixReadyTests=true $(_InternalRuntimeDownloadArgs)
             beforeBuild:
+            - script: git submodule update --init
+              displayName: Update submodules
             - bash: "./eng/scripts/install-nginx-linux.sh"
               displayName: Installing Nginx
             - bash: "echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p"
@@ -582,6 +618,9 @@ extends:
             jobDisplayName: 'Tests: Helix x64 Subset 1'
             agentOs: Windows
             timeoutInMinutes: 240
+            beforeBuild:
+            - script: git submodule update --init
+              displayName: Update submodules
             steps:
             # Build the shared framework
             - script: ./eng/build.cmd -ci -prepareMachine -nativeToolsOnMachine -nobl -all -pack -arch x64
@@ -611,6 +650,9 @@ extends:
             jobDisplayName: 'Tests: Helix x64 Subset 2'
             agentOs: Windows
             timeoutInMinutes: 240
+            beforeBuild:
+            - script: git submodule update --init
+              displayName: Update submodules
             steps:
             # Build the shared framework
             - script: ./eng/build.cmd -ci -prepareMachine -nativeToolsOnMachine -nobl -all -pack -arch x64
@@ -642,6 +684,9 @@ extends:
               agentOs: Windows
               isAzDOTestingJob: true
               timeoutInMinutes: 240
+              beforeBuild:
+              - script: git submodule update --init
+                displayName: Update submodules
               steps:
               - script: git submodule update --init
                 displayName: Update submodules
@@ -670,17 +715,4 @@ extends:
                 path: artifacts/log/
                 publishOnError: true
                 includeForks: true
-      # Source build
-      - template: /eng/common/templates-official/job/source-build.yml@self
-        parameters:
-          enableInternalSources: true
-          platform:
-            name: 'Managed'
-            container: 'mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream-10-amd64'
-            buildScript: './eng/build.sh'
-            buildArguments: '--source-build $(_InternalRuntimeDownloadArgs)'
-            jobProperties:
-              timeoutInMinutes: 120
-              variables:
-                # Log environment variables in binary logs to ease debugging
-                MSBUILDLOGALLENVIRONMENTVARIABLES: true
+