diff --git a/pipelines/templates/common.yml b/pipelines/templates/common.yml
index 4fb5f67cd6b..d97c514ad32 100644
--- a/pipelines/templates/common.yml
+++ b/pipelines/templates/common.yml
@@ -10,9 +10,11 @@ parameters:
 
 steps:
 - powershell: |
-    # Some machines require that the protocol be explicitly set to Tls12
+    # Module management requires TLS 1.2.
     [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
-    Install-Module -Name UnitySetup -Scope CurrentUser -Force
+    if (-not (Get-InstalledModule -Name UnitySetup)) {
+        Install-Module -Name UnitySetup -Scope CurrentUser -Force
+    }
   displayName: Install unitysetup.powershell
 
 # Build Standalone x64.
diff --git a/pipelines/templates/tasks/assetretargeting.yml b/pipelines/templates/tasks/assetretargeting.yml
index 4a4f840390e..2ed51ae09f7 100644
--- a/pipelines/templates/tasks/assetretargeting.yml
+++ b/pipelines/templates/tasks/assetretargeting.yml
@@ -5,9 +5,11 @@ parameters:
 
 steps:
 - powershell: |
-    # Some machines require that the protocol be explicitly set to Tls12
+    # Module management requires TLS 1.2.
     [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
-    Install-Module -Name UnitySetup -Scope CurrentUser -Force
+    if (-not (Get-InstalledModule -Name UnitySetup)) {
+        Install-Module -Name UnitySetup -Scope CurrentUser -Force
+    }
   displayName: Install unitysetup.powershell
 
 - powershell: |
diff --git a/pipelines/templates/tasks/build-appx.yaml b/pipelines/templates/tasks/build-appx.yaml
index e78a2428ec6..60ecad83704 100644
--- a/pipelines/templates/tasks/build-appx.yaml
+++ b/pipelines/templates/tasks/build-appx.yaml
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
 # [Template] Build appx from a Unity-built sln.
 
 parameters:
diff --git a/pipelines/templates/tasks/build-unity.yaml b/pipelines/templates/tasks/build-unity.yaml
index 08c3918534d..da26b7e08a7 100644
--- a/pipelines/templates/tasks/build-unity.yaml
+++ b/pipelines/templates/tasks/build-unity.yaml
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
 # [Template] Build project inside Unity.
 
 parameters:
@@ -25,7 +28,14 @@ parameters:
   default: ''
 
 steps:
-- powershell: |
+- pwsh: |
+    # Module management requires TLS 1.2.
+    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+    # UnitySetup 5.5.146-develop specifically added support for Unity 2021.
+    if (-not (Get-InstalledModule -Name UnitySetup -MinimumVersion "5.5.146-develop" -AllowPrerelease)) {
+        Install-Module UnitySetup -Scope CurrentUser -Force -AllowPrerelease
+    }
+
     $logFile = Join-Path $(Agent.TempDirectory) "build_${{ parameters.BuildTarget }}.log"
     $proc = Start-UnityEditor -Project ${{ parameters.PathToProject }} -Version ${{ parameters.UnityVersion }} -ExecuteMethod ${{ parameters.CommandLineBuildMethod }} -BatchMode -Quit -PassThru -LogFile $logFile -BuildTarget ${{ parameters.BuildTarget }} -OutputPath ${{ parameters.OutputPath }} -AdditionalArguments "-CacheServerIPAddress ${Env:COG-UnityCache-WUS2-01} ${{ parameters.AdditionalArguments }}"
     $ljob = Start-Job -ScriptBlock { param($log) Get-Content "$log" -Wait } -ArgumentList $logFile
diff --git a/pipelines/templates/tasks/generate-projects.yml b/pipelines/templates/tasks/generate-projects.yml
index 7a9c83e426c..2f23842950f 100644
--- a/pipelines/templates/tasks/generate-projects.yml
+++ b/pipelines/templates/tasks/generate-projects.yml
@@ -5,9 +5,11 @@ parameters:
 
 steps:
 - powershell: |
-    # Some machines require that the protocol be explicitly set to Tls12
+    # Module management requires TLS 1.2.
     [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
-    Install-Module -Name UnitySetup -Scope CurrentUser -Force
+    if (-not (Get-InstalledModule -Name UnitySetup)) {
+        Install-Module -Name UnitySetup -Scope CurrentUser -Force
+    }
   displayName: Install unitysetup.powershell
 
 - powershell: |