No ldifde is for exporting user objects. What you need is a tool that
queries lastlogon attribute on all DC's in your domain to determine last
logon time. This is due to fact that lastlogon attribute is not replicated.
One such tool can be found on
www.joeware.net. Look under free utilities.
In Windows Server 2003 domain (2003 domain functionality level) there is a
lastlogontimestamp attribute, which is replicated, but it is not replicated
regularly, but every week or so, so the information there could be old. In
this case you can just use dsquery command line tool to get that
information.
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Regards
Matjaz Ladava, MCSA, MCSE, MCT, MVP
Microsoft MVP Windows Server - Active Directory
(e-mail address removed), (e-mail address removed)