RPC server unavailable

 Bir kac gun once yeni bir serveri Windows 2008 R2 kurup DC (Kangaroo) yaptim. Su an hemen alttaki hata siklikla loglaniyor. Hataya gore anladigim kadariyla CA olan diger DC`de (Vegemite) RPC Server yok. Bunu cozmek icin alttaki resimdeki ozelligi mi kurmam gerekiyor? Bunu kurarsam hali hazirdaki Exchnage sertifikasina vs etki eder mi?

Log Name:      Application
Source:        Microsoft-Windows-CertificateServicesClient-CertEnroll
Date:          7/06/2010 1:07:24 AM
Event ID:      13
Task Category: None
Level:         Error
Keywords:      Classic
User:          SYSTEM
Computer:      KANGAROO.icb.local
Description:
Certificate enrollment for Local system failed to enroll for a DomainController certificate with request ID N/A from VEGEMITE.icb.local\icb-VEGEMITE-CA (The RPC server is unavailable. 0x800706ba (WIN32: 1722)).
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-CertificateServicesClient-CertEnroll" Guid="{54164045-7C50-4905-963F-E5BC1EEF0CCA}" EventSourceName="CertEnroll" />
    <EventID Qualifiers="49754">13</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>0</Task>
    <Opcode>0</Opcode>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2010-06-06T15:07:24.000000000Z" />
    <EventRecordID>733</EventRecordID>
    <Correlation />
    <Execution ProcessID="0" ThreadID="0" />
    <Channel>Application</Channel>
    <Computer>KANGAROO.icb.local</Computer>
    <Security UserID="S-1-5-18" />
  </System>
  <EventData>
    <Data Name="Context">Local system</Data>
    <Data Name="TemplateName">DomainController</Data>
    <Data Name="RequestId">VEGEMITE.icb.local\icb-VEGEMITE-CA</Data>
    <Data Name="CA">N/A</Data>
    <Data Name="ErrorCode">The RPC server is unavailable. 0x800706ba (WIN32: 1722)</Data>
  </EventData>
</Event>