Edit C:\Windows\PolicyDefinitions\ServerManager.admx

??<?xml version="1.0" encoding="utf-8"?>

<policyDefinitions xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   revision="1.0" schemaVersion="1.0" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
  <policyNamespaces>
    <target prefix="servermanager" namespace="Microsoft.Policies.ServerManager" />
    <using prefix="windows" namespace="Microsoft.Policies.Windows" />
    <using prefix="server" namespace="Microsoft.Policies.Server" />
  </policyNamespaces>
  <resources minRequiredRevision="1.0" />
  <supportedOn>
    <definitions>
     
     <definition name="SUPPORTED_WindowsServer2008OrWindowsServer2008R2Only" displayName="$(string.SUPPORTED_WindowsServer2008OrWindowsServer2008R2Only)">
       <or>
        <reference ref="products:WindowsServer2008R2"/>
        <reference ref="products:WindowsServer2008"/>
      </or>
     </definition>
    </definitions>
  </supportedOn>
  <categories>
    <category name="ServerManager" displayName="$(string.ServerManager)">
      <parentCategory ref="windows:System" />
    </category>
  </categories>
  <policies>
    <policy name="DoNotLaunchServerManager" class="Machine" displayName="$(string.DoNotLaunchServerManager)" explainText="$(string.DoNotLaunchServerManagerHelp)" key="Software\Policies\Microsoft\Windows\Server\ServerManager" valueName="DoNotOpenAtLogon">
      <parentCategory ref="ServerManager" />
      <supportedOn ref="server:SUPPORTED_WindowsServer2008" />
      <enabledValue>
        <decimal value="1" />
      </enabledValue>
      <disabledValue>
        <decimal value="0" />
      </disabledValue>
    </policy>
    <policy name="ServerManagerAutoRefreshRate" class="Machine" displayName="$(string.ServerManagerAutoRefreshRate)" explainText="$(string.ServerManagerAutoRefreshRateHelp)" presentation="$(presentation.ServerManagerAutoRefreshRate)" key="Software\Policies\Microsoft\Windows\Server\ServerManager" valueName="RefreshIntervalEnabled">
      <parentCategory ref="ServerManager" />
      <supportedOn ref="server:SUPPORTED_WindowsServer2008" />
      <enabledValue>
        <decimal value="1" />
      </enabledValue>
      <disabledValue>
        <decimal value="0" />
      </disabledValue>
      <elements>
        <decimal id="RefreshRate" valueName="RefreshInterval" required="true" minValue="1" maxValue="34560" />
      </elements>
    </policy>
    <policy name="DoNotLaunchInitialConfigurationTasks" class="Machine" displayName="$(string.DoNotLaunchInitialConfigurationTasks)" explainText="$(string.DoNotLaunchInitialConfigurationTasksHelp)" key="Software\Policies\Microsoft\Windows\Server\InitialConfigurationTasks" valueName="DoNotOpenAtLogon">
      <parentCategory ref="ServerManager" />
      <supportedOn ref="SUPPORTED_WindowsServer2008OrWindowsServer2008R2Only" />
      <enabledValue>
        <decimal value="1" />
      </enabledValue>
      <disabledValue>
        <decimal value="0" />
      </disabledValue>
    </policy>
    <policy name="Do_not_display_Manage_Your_Server_page" class="Machine" displayName="$(string.Do_not_display_Manage_Your_Server_page)" explainText="$(string.Do_not_display_Manage_Your_Server_page_Explain)" key="Software\Policies\Microsoft\Windows NT\CurrentVersion\MYS" valueName="DisableShowAtLogon">
      <parentCategory ref="windows:System" />
      <supportedOn ref="windows:SUPPORTED_WindowsNET" />
      <enabledValue>
        <decimal value="1" />
      </enabledValue>
      <disabledValue>
        <decimal value="0" />
      </disabledValue>
    </policy>
  </policies>
</policyDefinitions>

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