diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 51874a03cef10..ec3342dbf8958 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -127,19 +127,19 @@
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="9.0.0-beta.25577.5">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="9.0.0-beta.25611.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0890ca08513391dafe556fb326c73c6c5c6cb329</Sha>
+      <Sha>e9983e548f5b9638784f3b2696eb6cb3e7366548</Sha>
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.arcade" Version="9.0.0-beta.25577.5">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.arcade" Version="9.0.0-beta.25611.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0890ca08513391dafe556fb326c73c6c5c6cb329</Sha>
+      <Sha>e9983e548f5b9638784f3b2696eb6cb3e7366548</Sha>
       <SourceBuild RepoName="arcade" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XliffTasks" Version="9.0.0-beta.25577.5">
+    <Dependency Name="Microsoft.DotNet.XliffTasks" Version="9.0.0-beta.25611.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0890ca08513391dafe556fb326c73c6c5c6cb329</Sha>
+      <Sha>e9983e548f5b9638784f3b2696eb6cb3e7366548</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DiaSymReader" Version="2.0.0">
       <Uri>https://github.com/dotnet/symreader</Uri>
@@ -155,9 +155,9 @@
       <Uri>https://github.com/dotnet/roslyn</Uri>
       <Sha>5d10d428050c0d6afef30a072c4ae68776621877</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="9.0.0-beta.25577.5">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="9.0.0-beta.25611.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0890ca08513391dafe556fb326c73c6c5c6cb329</Sha>
+      <Sha>e9983e548f5b9638784f3b2696eb6cb3e7366548</Sha>
     </Dependency>
     <Dependency Name="Microsoft.CodeAnalysis.NetAnalyzers" Version="8.0.0-preview.23468.1">
       <Uri>https://github.com/dotnet/roslyn-analyzers</Uri>
diff --git a/eng/common/core-templates/job/source-index-stage1.yml b/eng/common/core-templates/job/source-index-stage1.yml
index 662b9fcce154f..ddf8c2e00d803 100644
--- a/eng/common/core-templates/job/source-index-stage1.yml
+++ b/eng/common/core-templates/job/source-index-stage1.yml
@@ -6,7 +6,7 @@ parameters:
   sourceIndexBuildCommand: powershell -NoLogo -NoProfile -ExecutionPolicy Bypass -Command "eng/common/build.ps1 -restore -build -binarylog -ci"
   preSteps: []
   binlogPath: artifacts/log/Debug/Build.binlog
-  condition: ''
+  condition: eq(variables['Build.SourceBranch'], 'refs/heads/main')
   dependsOn: ''
   pool: ''
   is1ESPipeline: ''
diff --git a/eng/common/internal-feed-operations.ps1 b/eng/common/internal-feed-operations.ps1
index 92b77347d9904..c282d3ae403a0 100644
--- a/eng/common/internal-feed-operations.ps1
+++ b/eng/common/internal-feed-operations.ps1
@@ -26,7 +26,7 @@ function SetupCredProvider {
   $url = 'https://raw.githubusercontent.com/microsoft/artifacts-credprovider/master/helpers/installcredprovider.ps1'
   
   Write-Host "Writing the contents of 'installcredprovider.ps1' locally..."
-  Invoke-WebRequest $url -OutFile installcredprovider.ps1
+  Invoke-WebRequest $url -UseBasicParsing -OutFile installcredprovider.ps1
   
   Write-Host 'Installing plugin...'
   .\installcredprovider.ps1 -Force
diff --git a/eng/common/post-build/nuget-verification.ps1 b/eng/common/post-build/nuget-verification.ps1
index ac5c69ffcac59..eea88e653c911 100644
--- a/eng/common/post-build/nuget-verification.ps1
+++ b/eng/common/post-build/nuget-verification.ps1
@@ -65,7 +65,7 @@ if ($NuGetExePath) {
         Write-Host "Downloading nuget.exe from $nugetExeUrl..."
         $ProgressPreference = 'SilentlyContinue'
         try {
-            Invoke-WebRequest $nugetExeUrl -OutFile $downloadedNuGetExe
+            Invoke-WebRequest $nugetExeUrl -UseBasicParsing -OutFile $downloadedNuGetExe
             $ProgressPreference = 'Continue'
         } catch {
             $ProgressPreference = 'Continue'
diff --git a/eng/common/tools.ps1 b/eng/common/tools.ps1
index 9b3ad8840fdb2..a06513a594071 100644
--- a/eng/common/tools.ps1
+++ b/eng/common/tools.ps1
@@ -266,7 +266,7 @@ function GetDotNetInstallScript([string] $dotnetRoot) {
 
     Retry({
       Write-Host "GET $uri"
-      Invoke-WebRequest $uri -OutFile $installScript
+      Invoke-WebRequest $uri -UseBasicParsing -OutFile $installScript
     })
   }
 
@@ -499,7 +499,7 @@ function InitializeXCopyMSBuild([string]$packageVersion, [bool]$install) {
     Write-Host "Downloading $packageName $packageVersion"
     $ProgressPreference = 'SilentlyContinue' # Don't display the console progress UI - it's a huge perf hit
     Retry({
-      Invoke-WebRequest "https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/flat2/$packageName/$packageVersion/$packageName.$packageVersion.nupkg" -OutFile $packagePath
+      Invoke-WebRequest "https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/flat2/$packageName/$packageVersion/$packageName.$packageVersion.nupkg" -UseBasicParsing -OutFile $packagePath
     })
 
     if (!(Test-Path $packagePath)) {
@@ -543,23 +543,30 @@ function LocateVisualStudio([object]$vsRequirements = $null){
     Create-Directory $vsWhereDir
     Write-Host 'Downloading vswhere'
     Retry({
-      Invoke-WebRequest "https://netcorenativeassets.blob.core.windows.net/resource-packages/external/windows/vswhere/$vswhereVersion/vswhere.exe" -OutFile $vswhereExe
+      Invoke-WebRequest "https://netcorenativeassets.blob.core.windows.net/resource-packages/external/windows/vswhere/$vswhereVersion/vswhere.exe" -UseBasicParsing -OutFile $vswhereExe
     })
   }
 
-  if (!$vsRequirements) { $vsRequirements = $GlobalJson.tools.vs }
+  if (!$vsRequirements) {
+    if (Get-Member -InputObject $GlobalJson.tools -Name 'vs' -ErrorAction SilentlyContinue) {
+      $vsRequirements = $GlobalJson.tools.vs
+    } else {
+      $vsRequirements = $null
+    }
+  }
+
   $args = @('-latest', '-format', 'json', '-requires', 'Microsoft.Component.MSBuild', '-products', '*')
 
   if (!$excludePrereleaseVS) {
     $args += '-prerelease'
   }
 
-  if (Get-Member -InputObject $vsRequirements -Name 'version') {
+  if ($vsRequirements -and (Get-Member -InputObject $vsRequirements -Name 'version' -ErrorAction SilentlyContinue)) {
     $args += '-version'
     $args += $vsRequirements.version
   }
 
-  if (Get-Member -InputObject $vsRequirements -Name 'components') {
+  if ($vsRequirements -and (Get-Member -InputObject $vsRequirements -Name 'components' -ErrorAction SilentlyContinue)) {
     foreach ($component in $vsRequirements.components) {
       $args += '-requires'
       $args += $component
diff --git a/global.json b/global.json
index 137e8893af684..e90e6687ceb84 100644
--- a/global.json
+++ b/global.json
@@ -11,8 +11,8 @@
     }
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "9.0.0-beta.25577.5",
-    "Microsoft.DotNet.Helix.Sdk": "9.0.0-beta.25577.5",
+    "Microsoft.DotNet.Arcade.Sdk": "9.0.0-beta.25611.4",
+    "Microsoft.DotNet.Helix.Sdk": "9.0.0-beta.25611.4",
     "Microsoft.Build.Traversal": "3.4.0"
   }
 }