diff --git a/lib/puppet/parser/functions/parse_auto_update_option.rb b/lib/puppet/parser/functions/parse_auto_update_option.rb
index e8948e0..5b013ee 100644
--- a/lib/puppet/parser/functions/parse_auto_update_option.rb
+++ b/lib/puppet/parser/functions/parse_auto_update_option.rb
@@ -18,13 +18,14 @@ module Puppet::Parser::Functions
     autoupdate_hash = { 'notifyonly' => 2,
                         'autonotify' => 3,
                         'scheduled' => 4,
-                        'autoinstall' => 5 }
+                        'autoinstall' => 5,
+                        'notifyrestart' => 7 }
 
     option = args[0]
-    error_msg = "Valid options for auto_update_option are NotifyOnly|AutoNotify|Scheduled|AutoInstall|2|3|4|5, provided '#{option}'"
+    error_msg = "Valid options for auto_update_option are NotifyOnly|AutoNotify|Scheduled|AutoInstall|NotifyRestart|2|3|4|5|7, provided '#{option}'"
     if option.is_a?(Numeric) || option =~ %r{^\d$}
       option = Integer(option) if option.is_a?(String)
-      raise Puppet::ParseError, error_msg if option < 2 || option > 5
+      raise Puppet::ParseError, error_msg if option < 2 || option > 7
 
       return option
     end
diff --git a/manifests/init.pp b/manifests/init.pp
index 3d87816..1278dd8 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -140,7 +140,8 @@
   Optional[Variant[Stdlib::HTTPUrl,Boolean]] $server_url                                                            = undef,
   Optional[Boolean] $enable_status_server                                                                           = undef,
   Optional[Boolean] $accept_trusted_publisher_certs                                                                 = undef,
-  Optional[Variant[Enum['NotifyOnly', 'AutoNotify', 'Scheduled', 'AutoInstall'],Integer[2,5]]] $auto_update_option  = undef,
+  Optional[Variant[Enum['NotifyOnly', 'AutoNotify', 'Scheduled', 'AutoInstall', 'NotifyRestart'],Integer[2,5],Integer[7,7]]]
+  $auto_update_option                                                                                               = undef,
   Optional[Boolean] $auto_install_minor_updates                                                                     = undef,
   Optional[Variant[Integer[1,22],Boolean]] $detection_frequency_hours                                               = undef,
   Optional[Boolean] $disable_windows_update_access                                                                  = undef,
@@ -212,6 +213,16 @@
 
   if $auto_update_option {
     $_parsed_auto_update_option = parse_auto_update_option($auto_update_option)
+
+    # Option 7 is only supported on Windows Server 2016 and later.
+    if $_parsed_auto_update_option == 7 {
+      # Windows 2012's major version in facter is "2012 R2" which cannot be converted to integer directly.
+      # So, extract the leading digits from the major release string.
+      $_windows_version = regsubst($facts['os']['release']['major'], '^(\d+).*$', '\1')
+      if (Integer($_windows_version) < 2016) {
+        fail('auto_update_option value 7 is only supported on Windows Server 2016 and later.')
+      }
+    }
     if $_parsed_auto_update_option == 4 and !($scheduled_install_day and $scheduled_install_hour) {
       fail("scheduled_install_day and scheduled_install_hour required when specifying auto_update_option => '${auto_update_option}'")
     }
diff --git a/spec/classes/init_spec.rb b/spec/classes/init_spec.rb
index 289b151..a601bbd 100644
--- a/spec/classes/init_spec.rb
+++ b/spec/classes/init_spec.rb
@@ -241,7 +241,7 @@
                 auto_update_option: au_opt
               }
             end
-            let(:error_message) { %r{expects a value of type Undef, Enum\['AutoInstall', 'AutoNotify', 'NotifyOnly', 'Scheduled'\], or Integer\[2, 5\]} }
+            let(:error_message) { %r{expects a value of type Undef, Enum\['AutoInstall', 'AutoNotify', 'NotifyOnly', 'NotifyRestart', 'Scheduled'\], Integer\[2, 5\], or Integer\[7, 7\]} }
 
             it_behaves_like 'fail validation'
           end
diff --git a/spec/functions/parse_auto_update_option_spec.rb b/spec/functions/parse_auto_update_option_spec.rb
index 2bedddb..2b561ce 100644
--- a/spec/functions/parse_auto_update_option_spec.rb
+++ b/spec/functions/parse_auto_update_option_spec.rb
@@ -6,7 +6,8 @@
   expected_hash = { 'NotifyOnly' => 2,
                     'AutoNotify' => 3,
                     'Scheduled' => 4,
-                    'AutoInstall' => 5 }
+                    'AutoInstall' => 5,
+                    'NotifyRestart' => 7 }
 
   expected_hash.each_key do |auto_update_option|
     describe "when parsing #{auto_update_option}" do
@@ -41,7 +42,7 @@
       expect {
         scope.function_parse_auto_update_option(['Whatthe'])
       }.to raise_error(Puppet::Error,
-                       "Valid options for auto_update_option are #{expected_hash.keys.join('|')}|2|3|4|5, provided 'Whatthe'")
+                       "Valid options for auto_update_option are #{expected_hash.keys.join('|')}|2|3|4|5|7, provided 'Whatthe'")
     end
   end
 end