diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index a1a329343c1..892ee680c28 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -95,25 +95,25 @@
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="6.0.0-beta.21254.3">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="6.0.0-beta.21264.2">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0cfaf935894a4c98ff7445c903f1b4c32990b127</Sha>
+      <Sha>42de78a825b575a1ddeb73020a01fb8cd9311d09</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.CodeAnalysis" Version="6.0.0-beta.21254.3">
+    <Dependency Name="Microsoft.DotNet.CodeAnalysis" Version="6.0.0-beta.21264.2">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0cfaf935894a4c98ff7445c903f1b4c32990b127</Sha>
+      <Sha>42de78a825b575a1ddeb73020a01fb8cd9311d09</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="6.0.0-beta.21254.3">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="6.0.0-beta.21264.2">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0cfaf935894a4c98ff7445c903f1b4c32990b127</Sha>
+      <Sha>42de78a825b575a1ddeb73020a01fb8cd9311d09</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.ApiCompat" Version="6.0.0-beta.21254.3">
+    <Dependency Name="Microsoft.DotNet.ApiCompat" Version="6.0.0-beta.21264.2">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0cfaf935894a4c98ff7445c903f1b4c32990b127</Sha>
+      <Sha>42de78a825b575a1ddeb73020a01fb8cd9311d09</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.GenAPI" Version="6.0.0-beta.21254.3">
+    <Dependency Name="Microsoft.DotNet.GenAPI" Version="6.0.0-beta.21264.2">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>0cfaf935894a4c98ff7445c903f1b4c32990b127</Sha>
+      <Sha>42de78a825b575a1ddeb73020a01fb8cd9311d09</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>
diff --git a/eng/Versions.props b/eng/Versions.props
index 47f0fdeb44d..77ccdc7220c 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -42,9 +42,9 @@
   </PropertyGroup>
   <!-- Packages that come from https://github.com/dotnet/arcade -->
   <PropertyGroup>
-    <MicrosoftDotNetApiCompatVersion>6.0.0-beta.21254.3</MicrosoftDotNetApiCompatVersion>
-    <MicrosoftDotNetCodeAnalysisPackageVersion>6.0.0-beta.21254.3</MicrosoftDotNetCodeAnalysisPackageVersion>
-    <MicrosoftDotNetGenAPIVersion>6.0.0-beta.21254.3</MicrosoftDotNetGenAPIVersion>
+    <MicrosoftDotNetApiCompatVersion>6.0.0-beta.21264.2</MicrosoftDotNetApiCompatVersion>
+    <MicrosoftDotNetCodeAnalysisPackageVersion>6.0.0-beta.21264.2</MicrosoftDotNetCodeAnalysisPackageVersion>
+    <MicrosoftDotNetGenAPIVersion>6.0.0-beta.21264.2</MicrosoftDotNetGenAPIVersion>
   </PropertyGroup>
   <!-- Maintain System.CodeDom PackageVersion at 4.4.0. See https://github.com/Microsoft/msbuild/issues/3627 -->
   <!-- Pin specific versions of S.Memory so that it would supply AssemblyVersion=4.0.1.0. See https://github.com/dotnet/runtime/issues/31672 -->
diff --git a/eng/common/build.ps1 b/eng/common/build.ps1
index 94a91c0817e..8943da242f6 100644
--- a/eng/common/build.ps1
+++ b/eng/common/build.ps1
@@ -25,6 +25,7 @@ Param(
   [switch] $prepareMachine,
   [string] $runtimeSourceFeed = '',
   [string] $runtimeSourceFeedKey = '',
+  [switch] $excludePrereleaseVS,
   [switch] $help,
   [Parameter(ValueFromRemainingArguments=$true)][String[]]$properties
 )
@@ -65,6 +66,7 @@ function Print-Usage() {
   Write-Host "  -prepareMachine         Prepare machine for CI run, clean up processes after build"
   Write-Host "  -warnAsError <value>    Sets warnaserror msbuild parameter ('true' or 'false')"
   Write-Host "  -msbuildEngine <value>  Msbuild engine to use to run build ('dotnet', 'vs', or unspecified)."
+  Write-Host "  -excludePrereleaseVS    Set to exclude build engines in prerelease versions of Visual Studio"
   Write-Host ""
 
   Write-Host "Command line arguments not listed above are passed thru to msbuild."
diff --git a/eng/common/cross/build-android-rootfs.sh b/eng/common/cross/build-android-rootfs.sh
index c29c8267e7a..42516bbeebc 100755
--- a/eng/common/cross/build-android-rootfs.sh
+++ b/eng/common/cross/build-android-rootfs.sh
@@ -106,7 +106,6 @@ __AndroidPackages+=" libandroid-glob"
 __AndroidPackages+=" liblzma"
 __AndroidPackages+=" krb5"
 __AndroidPackages+=" openssl"
-__AndroidPackages+=" openldap"
 
 for path in $(wget -qO- http://termux.net/dists/stable/main/binary-$__AndroidArch/Packages |\
     grep -A15 "Package: \(${__AndroidPackages// /\\|}\)" | grep -v "static\|tool" | grep Filename); do
diff --git a/eng/common/cross/build-rootfs.sh b/eng/common/cross/build-rootfs.sh
index df0dfa5781c..591d8666a84 100755
--- a/eng/common/cross/build-rootfs.sh
+++ b/eng/common/cross/build-rootfs.sh
@@ -55,13 +55,11 @@ __UbuntuPackages+=" libcurl4-openssl-dev"
 __UbuntuPackages+=" libkrb5-dev"
 __UbuntuPackages+=" libssl-dev"
 __UbuntuPackages+=" zlib1g-dev"
-__UbuntuPackages+=" libldap2-dev"
 
 __AlpinePackages+=" curl-dev"
 __AlpinePackages+=" krb5-dev"
 __AlpinePackages+=" openssl-dev"
 __AlpinePackages+=" zlib-dev"
-__AlpinePackages+=" openldap-dev"
 
 __FreeBSDBase="12.1-RELEASE"
 __FreeBSDPkg="1.12.0"
@@ -70,13 +68,11 @@ __FreeBSDPackages+=" icu"
 __FreeBSDPackages+=" libinotify"
 __FreeBSDPackages+=" lttng-ust"
 __FreeBSDPackages+=" krb5"
-__FreeBSDPackages+=" libslapi-2.4"
 
 __IllumosPackages="icu-64.2nb2"
 __IllumosPackages+=" mit-krb5-1.16.2nb4"
 __IllumosPackages+=" openssl-1.1.1e"
 __IllumosPackages+=" zlib-1.2.11"
-__IllumosPackages+=" openldap-client-2.4.49"
 
 # ML.NET dependencies
 __UbuntuPackages+=" libomp5"
diff --git a/eng/common/msbuild.ps1 b/eng/common/msbuild.ps1
index c6401230002..eea19cd8452 100644
--- a/eng/common/msbuild.ps1
+++ b/eng/common/msbuild.ps1
@@ -5,6 +5,7 @@ Param(
   [bool] $nodeReuse = $true,
   [switch] $ci,
   [switch] $prepareMachine,
+  [switch] $excludePrereleaseVS,
   [Parameter(ValueFromRemainingArguments=$true)][String[]]$extraArgs
 )
 
diff --git a/eng/common/post-build/sourcelink-validation.ps1 b/eng/common/post-build/sourcelink-validation.ps1
index 8c554729b61..85c89861719 100644
--- a/eng/common/post-build/sourcelink-validation.ps1
+++ b/eng/common/post-build/sourcelink-validation.ps1
@@ -16,6 +16,8 @@ $global:RepoFiles = @{}
 # Maximum number of jobs to run in parallel
 $MaxParallelJobs = 16
 
+$MaxRetries = 5
+
 # Wait time between check for system load
 $SecondsBetweenLoadChecks = 10
 
@@ -29,7 +31,10 @@ $ValidatePackage = {
   # Ensure input file exist
   if (!(Test-Path $PackagePath)) {
     Write-Host "Input file does not exist: $PackagePath"
-    return 1
+    return [pscustomobject]@{
+      result = 1
+      packagePath = $PackagePath
+    }
   }
 
   # Extensions for which we'll look for SourceLink information
@@ -59,7 +64,10 @@ $ValidatePackage = {
 
           # We ignore resource DLLs
           if ($FileName.EndsWith('.resources.dll')) {
-            return
+            return [pscustomobject]@{
+              result = 0
+              packagePath = $PackagePath
+            }
           }
 
           [System.IO.Compression.ZipFileExtensions]::ExtractToFile($_, $TargetFile, $true)
@@ -91,36 +99,49 @@ $ValidatePackage = {
                     $Status = 200
                     $Cache = $using:RepoFiles
 
-                    if ( !($Cache.ContainsKey($FilePath)) ) {
-                      try {
-                        $Uri = $Link -as [System.URI]
-                      
-                        # Only GitHub links are valid
-                        if ($Uri.AbsoluteURI -ne $null -and ($Uri.Host -match 'github' -or $Uri.Host -match 'githubusercontent')) {
-                          $Status = (Invoke-WebRequest -Uri $Link -UseBasicParsing -Method HEAD -TimeoutSec 5).StatusCode
+                    $totalRetries = 0
+
+                    while ($totalRetries -lt $using:MaxRetries) {
+                      if ( !($Cache.ContainsKey($FilePath)) ) {
+                        try {
+                          $Uri = $Link -as [System.URI]
+                        
+                          # Only GitHub links are valid
+                          if ($Uri.AbsoluteURI -ne $null -and ($Uri.Host -match 'github' -or $Uri.Host -match 'githubusercontent')) {
+                            $Status = (Invoke-WebRequest -Uri $Link -UseBasicParsing -Method HEAD -TimeoutSec 5).StatusCode
+                          }
+                          else {
+                            # If it's not a github link, we want to break out of the loop and not retry.
+                            $Status = 0
+                            $totalRetries = $using:MaxRetries
+                          }
                         }
-                        else {
+                        catch {
+                          Write-Host $_
                           $Status = 0
                         }
                       }
-                      catch {
-                        write-host $_
-                        $Status = 0
-                      }
-                    }
 
-                    if ($Status -ne 200) {
-                      if ($NumFailedLinks -eq 0) {
-                        if ($FailedFiles.Value -eq 0) {
-                          Write-Host
+                      if ($Status -ne 200) {
+                        $totalRetries++
+                        
+                        if ($totalRetries -ge $using:MaxRetries) {
+                          if ($NumFailedLinks -eq 0) {
+                            if ($FailedFiles.Value -eq 0) {
+                              Write-Host
+                            }
+  
+                            Write-Host "`tFile $RealPath has broken links:"
+                          }
+  
+                          Write-Host "`t`tFailed to retrieve $Link"
+  
+                          $NumFailedLinks++
                         }
-
-                        Write-Host "`tFile $RealPath has broken links:"
                       }
-
-                      Write-Host "`t`tFailed to retrieve $Link"
-
-                      $NumFailedLinks++
+                      else {
+                        break
+                      }
                     }
                   }
               }
@@ -136,7 +157,7 @@ $ValidatePackage = {
         }
   }
   catch {
-  
+    Write-Host $_
   }
   finally {
     $zip.Dispose() 
@@ -220,6 +241,7 @@ function ValidateSourceLinkLinks {
   # Process each NuGet package in parallel
   Get-ChildItem "$InputPath\*.symbols.nupkg" |
     ForEach-Object {
+      Write-Host "Starting $($_.FullName)"
       Start-Job -ScriptBlock $ValidatePackage -ArgumentList $_.FullName | Out-Null
       $NumJobs = @(Get-Job -State 'Running').Count
       
@@ -267,6 +289,10 @@ function InstallSourcelinkCli {
 try {
   InstallSourcelinkCli
 
+  foreach ($Job in @(Get-Job)) {
+    Remove-Job -Id $Job.Id
+  }
+
   ValidateSourceLinkLinks 
 }
 catch {
diff --git a/eng/common/post-build/symbols-validation.ps1 b/eng/common/post-build/symbols-validation.ps1
index 788321d773d..a5af041ba77 100644
--- a/eng/common/post-build/symbols-validation.ps1
+++ b/eng/common/post-build/symbols-validation.ps1
@@ -114,6 +114,7 @@ $CountMissingSymbols = {
       $totalRetries = 0
 
       while ($totalRetries -lt $using:MaxRetry) {
+
         # Save the output and get diagnostic output
         $output = & $dotnetSymbolExe --symbols --modules $WindowsPdbVerificationParam $TargetServerParam $FullPath -o $SymbolsPath --diagnostics | Out-String
 
@@ -132,20 +133,28 @@ $CountMissingSymbols = {
         elseif (Test-Path $SymbolPath) {
           return 'Module'
         }
-        elseif ($output.Contains("503 Service Unavailable")) {
-          # If we got a 503 error, we should retry.
+        else
+        {
           $totalRetries++
         }
-        else {
-          return $null
-        }
       }
       
       return $null
     }
 
-    $SymbolsOnMSDL = & $FirstMatchingSymbolDescriptionOrDefault $FileName '--microsoft-symbol-server' $SymbolsPath $WindowsPdbVerificationParam
-    $SymbolsOnSymWeb = & $FirstMatchingSymbolDescriptionOrDefault $FileName '--internal-server' $SymbolsPath $WindowsPdbVerificationParam
+    $FileGuid = New-Guid
+    $ExpandedSymbolsPath = Join-Path -Path $SymbolsPath -ChildPath $FileGuid
+
+    $SymbolsOnMSDL = & $FirstMatchingSymbolDescriptionOrDefault `
+        -FullPath $FileName `
+        -TargetServerParam '--microsoft-symbol-server' `
+        -SymbolsPath "$ExpandedSymbolsPath-msdl" `
+        -WindowsPdbVerificationParam $WindowsPdbVerificationParam
+    $SymbolsOnSymWeb = & $FirstMatchingSymbolDescriptionOrDefault `
+        -FullPath $FileName `
+        -TargetServerParam '--internal-server' `
+        -SymbolsPath "$ExpandedSymbolsPath-symweb" `
+        -WindowsPdbVerificationParam $WindowsPdbVerificationParam
 
     Write-Host -NoNewLine "`t Checking file " $FileName "... "
   
@@ -208,6 +217,7 @@ function CheckSymbolsAvailable {
     Remove-Item $ExtractPath -Force  -Recurse -ErrorAction SilentlyContinue
   }
 
+  $TotalPackages = 0
   $TotalFailures = 0
   $DupedSymbols = 0
 
@@ -230,6 +240,8 @@ function CheckSymbolsAvailable {
         return
       }
 
+      $TotalPackages++
+
       Start-Job -ScriptBlock $CountMissingSymbols -ArgumentList @($FullName,$WindowsPdbVerificationParam) | Out-Null
 
       $NumJobs = @(Get-Job -State 'Running').Count
@@ -255,11 +267,11 @@ function CheckSymbolsAvailable {
 
   if ($TotalFailures -gt 0 -or $DupedSymbols -gt 0) {
     if ($TotalFailures -gt 0) {
-      Write-PipelineTelemetryError -Category 'CheckSymbols' -Message "Symbols missing for $TotalFailures packages"
+      Write-PipelineTelemetryError -Category 'CheckSymbols' -Message "Symbols missing for $TotalFailures/$TotalPackages packages"
     }
 
     if ($DupedSymbols -gt 0) {
-      Write-PipelineTelemetryError -Category 'CheckSymbols' -Message "$DupedSymbols packages had duplicated symbol files"
+      Write-PipelineTelemetryError -Category 'CheckSymbols' -Message "$DupedSymbols/$TotalPackages packages had duplicated symbol files and could not be extracted"
     }
     
     ExitWithExitCode 1
diff --git a/eng/common/tools.ps1 b/eng/common/tools.ps1
index d52467eea11..2d8a74f7d9e 100644
--- a/eng/common/tools.ps1
+++ b/eng/common/tools.ps1
@@ -48,6 +48,9 @@
 # True to use global NuGet cache instead of restoring packages to repository-local directory.
 [bool]$useGlobalNuGetCache = if (Test-Path variable:useGlobalNuGetCache) { $useGlobalNuGetCache } else { !$ci }
 
+# True to exclude prerelease versions Visual Studio during build
+[bool]$excludePrereleaseVS = if (Test-Path variable:excludePrereleaseVS) { $excludePrereleaseVS } else { $false }
+
 # An array of names of processes to stop on script exit if prepareMachine is true.
 $processesToStopOnExit = if (Test-Path variable:processesToStopOnExit) { $processesToStopOnExit } else { @('msbuild', 'dotnet', 'vbcscompiler') }
 
@@ -463,7 +466,11 @@ function LocateVisualStudio([object]$vsRequirements = $null){
   }
 
   if (!$vsRequirements) { $vsRequirements = $GlobalJson.tools.vs }
-  $args = @('-latest', '-prerelease', '-format', 'json', '-requires', 'Microsoft.Component.MSBuild', '-products', '*')
+  $args = @('-latest', '-format', 'json', '-requires', 'Microsoft.Component.MSBuild', '-products', '*')
+
+  if (!$excludePrereleaseVS) {
+    $args += '-prerelease'
+  }
 
   if (Get-Member -InputObject $vsRequirements -Name 'version') {
     $args += '-version'
@@ -489,7 +496,13 @@ function LocateVisualStudio([object]$vsRequirements = $null){
 
 function InitializeBuildTool() {
   if (Test-Path variable:global:_BuildTool) {
-    return $global:_BuildTool
+    # If the requested msbuild parameters do not match, clear the cached variables.
+    if($global:_BuildTool.Contains('ExcludePrereleaseVS') -and $global:_BuildTool.ExcludePrereleaseVS -ne $excludePrereleaseVS) {
+      Remove-Item variable:global:_BuildTool 
+      Remove-Item variable:global:_MSBuildExe
+    } else {
+      return $global:_BuildTool
+    }
   }
 
   if (-not $msbuildEngine) {
@@ -517,7 +530,7 @@ function InitializeBuildTool() {
       ExitWithExitCode 1
     }
 
-    $buildTool = @{ Path = $msbuildPath; Command = ""; Tool = "vs"; Framework = "net472" }
+    $buildTool = @{ Path = $msbuildPath; Command = ""; Tool = "vs"; Framework = "net472"; ExcludePrereleaseVS = $excludePrereleaseVS }
   } else {
     Write-PipelineTelemetryError -Category 'InitializeToolset' -Message "Unexpected value of -msbuildEngine: '$msbuildEngine'."
     ExitWithExitCode 1
diff --git a/global.json b/global.json
index fb645c0911a..fb483341d5c 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1,6 @@
 {
   "tools": {
-    "dotnet": "6.0.100-preview.1.21103.13",
+    "dotnet": "6.0.100-preview.3.21202.5",
     "runtimes": {
       "dotnet": [
         "2.1.7",
@@ -12,11 +12,11 @@
     }
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "6.0.0-beta.21254.3",
-    "Microsoft.DotNet.Helix.Sdk": "6.0.0-beta.21254.3"
+    "Microsoft.DotNet.Arcade.Sdk": "6.0.0-beta.21264.2",
+    "Microsoft.DotNet.Helix.Sdk": "6.0.0-beta.21264.2"
   },
   "sdk": {
-    "version": "6.0.100-preview.1.21103.13"
+    "version": "6.0.100-preview.3.21202.5"
   },
   "native-tools": {
     "strawberry-perl": "5.28.1.1-1",