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Create MAPI Session Failed

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Retrospect Server:

Microsoft Windows Server 2003 R2 Enterprise SP2

Retrospect Multi Server 8.2.0 (177)


Exchange Server:

Microsoft Windows Server 2008 Enterprise SP2

Microsoft Exchange 2007 SP1

  .NET 4 Extended and Client Profile installed

  MAPI and Collaboration Data Objects 1.2.1 installed

  Visual C++ 2005, 2005 (x64), 2008 -x86, and 2010 x64 all installed

Retrospect Client 8.2

IPv6 disabled on NIC


Domain Controller:

Microsoft Windows Server 2003 R2 Enterprise SP2


We are getting the following error when attempting to backup our Exchange server:

* Resolved container Exchange Server on [servername] to 2 volumes:
First Storage Group on [servername]
Second Storage Group on [servername]
T-2: Create MAPI session failed: If the domain controller and Exchange server are installed on different Windows 2008 servers, this may be an issue of IPv6.
The databases get backed up; but, not the mailboxes. We do not have a Windows 2008 Domain Controller, and IPv6 is disabled on the Exchange server. Does anyone have any insight on how to solve this.
Thanks in advance.
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