diff --git a/eng/Version.Details.props b/eng/Version.Details.props
index 60b2f2d0f9..74ff489d59 100644
--- a/eng/Version.Details.props
+++ b/eng/Version.Details.props
@@ -6,7 +6,7 @@ This file should be imported by eng/Versions.props
 <Project>
   <PropertyGroup>
     <!-- dotnet-dotnet dependencies -->
-    <MicrosoftDotNetArcadeSdkPackageVersion>10.0.0-beta.26412.103</MicrosoftDotNetArcadeSdkPackageVersion>
+    <MicrosoftDotNetArcadeSdkPackageVersion>10.0.0-beta.26427.124</MicrosoftDotNetArcadeSdkPackageVersion>
   </PropertyGroup>
   <!--Property group for alternate package version names-->
   <PropertyGroup>
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index d507facdd3..39dbb0f426 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -1,12 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
-  <Source Uri="https://github.com/dotnet/dotnet" Mapping="command-line-api" Sha="493580a515a01970cfe1da2c7dd589efbaf36996" BarId="326844" />
+  <Source Uri="https://github.com/dotnet/dotnet" Mapping="command-line-api" Sha="2c07be8ab38eb69e43aedf74ed288079c839b1dc" BarId="329108" />
   <ProductDependencies>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="10.0.0-beta.26412.103">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="10.0.0-beta.26427.124">
       <Uri>https://github.com/dotnet/dotnet</Uri>
-      <Sha>493580a515a01970cfe1da2c7dd589efbaf36996</Sha>
+      <Sha>2c07be8ab38eb69e43aedf74ed288079c839b1dc</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>
diff --git a/eng/Versions.props b/eng/Versions.props
index 56dda1e7d3..2dd7aafb17 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -4,7 +4,7 @@
 
 <!-- Repo Version Information -->
   <PropertyGroup>
-    <VersionPrefix>2.0.12</VersionPrefix>
+    <VersionPrefix>2.0.13</VersionPrefix>
     <PreReleaseVersionLabel>servicing</PreReleaseVersionLabel>
     <PreReleaseVersionIteration></PreReleaseVersionIteration>
     <!-- Allowed values: '', 'prerelease', 'release'. Set to 'release' when stabilizing. -->
diff --git a/eng/common/Get-GitHubAppToken.ps1 b/eng/common/Get-GitHubAppToken.ps1
index 6b5899d7a2..9c7e3dcd6a 100644
--- a/eng/common/Get-GitHubAppToken.ps1
+++ b/eng/common/Get-GitHubAppToken.ps1
@@ -113,10 +113,13 @@ try {
     $installations = @()
     $page = 1
     do {
-        $pageInstallations = @(Invoke-RestMethod `
+        # Assign the response before wrapping it in @(). PowerShell otherwise
+        # preserves a top-level JSON array as one nested pipeline object.
+        $pageResponse = Invoke-RestMethod `
             -Uri "https://api.github.com/app/installations?per_page=100&page=$page" `
             -Headers $headers `
-            -Method Get)
+            -Method Get
+        $pageInstallations = @($pageResponse)
         $installations += $pageInstallations
         $page++
     } while ($pageInstallations.Count -eq 100)
@@ -125,12 +128,19 @@ catch {
     Write-PipelineTelemetryError -Category 'Build' -Message "Failed to list GitHub App installations: $_. The signed JWT may be invalid or the App's Client ID ('$AppClientId') may be incorrect."
     exit 1
 }
-$installation = $installations | Where-Object { $_.account.login -ieq $InstallationOwner } | Select-Object -First 1
-if (-not $installation) {
+$matchingInstallations = @($installations | Where-Object { $_.account.login -ieq $InstallationOwner })
+if ($matchingInstallations.Count -eq 0) {
     $found = ($installations | ForEach-Object { $_.account.login }) -join ', '
     Write-PipelineTelemetryError -Category 'Build' -Message "No installation found for '$InstallationOwner'. App is installed on: $found"
     exit 1
 }
+if ($matchingInstallations.Count -ne 1) {
+    $matchingIds = ($matchingInstallations | ForEach-Object { $_.id }) -join ', '
+    Write-PipelineTelemetryError -Category 'Build' -Message "Found multiple installations for '$InstallationOwner': $matchingIds"
+    exit 1
+}
+$installation = $matchingInstallations[0]
+Write-Host "Using installation $($installation.id) for '$($installation.account.login)'."
 
 try {
     $tokenResponse = Invoke-RestMethod `
diff --git a/eng/common/core-templates/job/onelocbuild.yml b/eng/common/core-templates/job/onelocbuild.yml
index b28af6613c..15d8c1571e 100644
--- a/eng/common/core-templates/job/onelocbuild.yml
+++ b/eng/common/core-templates/job/onelocbuild.yml
@@ -9,15 +9,15 @@ parameters:
   GithubPat: $(BotAccount-dotnet-bot-repo-PAT)
 
   # Service connection for WIF-based Entra authentication to ceapex feeds (replaces CeapexPat).
-  # When set, dnceng/internal builds acquire a federated Entra token instead of using a PAT.
-  # All other projects (e.g. DevDiv, public), where this dnceng-scoped service connection does not
-  # exist, and any pipeline that sets this to '' fall back to PAT-based auth via the CeapexPat parameter.
+  # The `internal` and `DevDiv` System.TeamProject values have same-named, project-scoped
+  # connections. Other values, and any pipeline that sets this to '', use the CeapexPat parameter.
   CeapexServiceConnection: 'dnceng-onelocbuild-ceapex'
 
-  # GitHub App authentication for the OneLoc check-in PR (dnceng/internal only).
-  # The infrastructure identifiers are centralized here and the App path is enabled by default.
-  # DevDiv requires its own project-scoped service connection before this path can be enabled there.
+  # GitHub App authentication for the OneLoc check-in PR.
+  # dnceng/internal and DevDiv/DevDiv are enabled by default with their project-scoped service
+  # connections. Other projects must explicitly opt in after provisioning equivalent infrastructure.
   UseGitHubAppAuthentication: true
+  UseGitHubAppAuthenticationInOtherProjects: false
   GitHubAppServiceConnection: 'dnceng-oneloc-githubapp'
   GitHubAppClientId: 'Iv23lijBU8x3gc9lDOc9'
   GitHubAppKeyVaultName: 'EngKeyVault'
@@ -88,22 +88,24 @@ jobs:
         displayName: Generate LocProject.json
         condition: ${{ parameters.condition }}
 
-    # Acquire an Entra token for ceapex feed access via WIF (dnceng/internal only).
-    # All other projects use PAT-based auth, since the ceapex service connection is scoped to dnceng/internal.
-    - ${{ if and(ne(parameters.CeapexServiceConnection, ''), eq(variables['System.TeamProject'], 'internal')) }}:
+    # Acquire an Entra token when System.TeamProject is `internal` or `DevDiv`.
+    - ${{ if and(ne(parameters.CeapexServiceConnection, ''), or(eq(variables['System.TeamProject'], 'internal'), eq(variables['System.TeamProject'], 'DevDiv'))) }}:
       - template: /eng/common/templates/steps/get-federated-access-token.yml
         parameters:
           federatedServiceConnection: ${{ parameters.CeapexServiceConnection }}
           outputVariableName: 'CeapexEntraToken'
           condition: ${{ parameters.condition }}
 
-    # Mint a short-lived GitHub App installation token for the loc check-in PR (dnceng/internal only).
-    # All other projects fall back to PAT-based auth, since the app service connection is scoped to dnceng/internal.
-    - ${{ if and(eq(parameters.RepoType, 'gitHub'), eq(parameters.UseGitHubAppAuthentication, true), eq(variables['System.TeamProject'], 'internal')) }}:
+    # Mint a short-lived GitHub App installation token for the loc check-in PR. Use the connection
+    # provisioned in each supported project; other projects must explicitly opt in and override it.
+    - ${{ if and(eq(parameters.RepoType, 'gitHub'), eq(parameters.UseGitHubAppAuthentication, true), or(eq(variables['System.TeamProject'], 'internal'), eq(variables['System.TeamProject'], 'DevDiv'), eq(parameters.UseGitHubAppAuthenticationInOtherProjects, true))) }}:
       - template: /eng/common/core-templates/steps/get-github-app-token.yml
         parameters:
           is1ESPipeline: ${{ parameters.is1ESPipeline }}
-          azureSubscription: ${{ parameters.GitHubAppServiceConnection }}
+          ${{ if and(eq(variables['System.TeamProject'], 'DevDiv'), eq(parameters.GitHubAppServiceConnection, 'dnceng-oneloc-githubapp')) }}:
+            azureSubscription: 'devdiv-oneloc-githubapp'
+          ${{ else }}:
+            azureSubscription: ${{ parameters.GitHubAppServiceConnection }}
           keyVaultName: ${{ parameters.GitHubAppKeyVaultName }}
           keyName: ${{ parameters.GitHubAppKeyName }}
           appClientId: ${{ parameters.GitHubAppClientId }}
@@ -126,15 +128,15 @@ jobs:
           isUseLfLineEndingsSelected: ${{ parameters.UseLfLineEndings }}
           isShouldReusePrSelected: ${{ parameters.ReusePr }}
         packageSourceAuth: patAuth
-        ${{ if and(ne(parameters.CeapexServiceConnection, ''), eq(variables['System.TeamProject'], 'internal')) }}:
+        ${{ if and(ne(parameters.CeapexServiceConnection, ''), or(eq(variables['System.TeamProject'], 'internal'), eq(variables['System.TeamProject'], 'DevDiv'))) }}:
           patVariable: $(CeapexEntraToken)
-        ${{ if or(eq(parameters.CeapexServiceConnection, ''), ne(variables['System.TeamProject'], 'internal')) }}:
+        ${{ if or(eq(parameters.CeapexServiceConnection, ''), and(ne(variables['System.TeamProject'], 'internal'), ne(variables['System.TeamProject'], 'DevDiv'))) }}:
           patVariable: ${{ parameters.CeapexPat }}
         ${{ if eq(parameters.RepoType, 'gitHub') }}:
           repoType: ${{ parameters.RepoType }}
-          ${{ if and(eq(parameters.UseGitHubAppAuthentication, true), eq(variables['System.TeamProject'], 'internal')) }}:
+          ${{ if and(eq(parameters.UseGitHubAppAuthentication, true), or(eq(variables['System.TeamProject'], 'internal'), eq(variables['System.TeamProject'], 'DevDiv'), eq(parameters.UseGitHubAppAuthenticationInOtherProjects, true))) }}:
             gitHubPatVariable: "$(GitHubAppInstallationToken)"
-          ${{ if or(eq(parameters.UseGitHubAppAuthentication, false), ne(variables['System.TeamProject'], 'internal')) }}:
+          ${{ else }}:
             gitHubPatVariable: "${{ parameters.GithubPat }}"
         ${{ if ne(parameters.MirrorRepo, '') }}:
           isMirrorRepoSelected: true
diff --git a/global.json b/global.json
index 4f97a64339..5c38bebf66 100644
--- a/global.json
+++ b/global.json
@@ -8,7 +8,7 @@
     }
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "10.0.0-beta.26412.103"
+    "Microsoft.DotNet.Arcade.Sdk": "10.0.0-beta.26427.124"
   },
   "sdk": {
     "version": "10.0.111"