You need Eseutil.exe and Ese.dll x86 versions for System Center Data Protection Manager (x86) to backup your Microsoft Exchange Server. As you know, you can’t use x64 files in DPM x86. If you don’t have any Microsoft Exchange Server 2007 x86 dvd and don’t want to download whole Microsoft Exchange Server 2007 (x86), you can obtain Eseutil.exe and Ese.dll x86 versions from this link:

FYI, Eseutil.exe: 8.1.240.3 (file version) – 27.11.2007 (date modified)