Hi Gharpe,
The Last Logon Reporting tool from ManageEngine ADManager Plus will help you achieve this- The tool is completely free and comes bundled along with other useful Free Active Directory tools. The tool can be downloaded from : http://www.manageengine.com/products/free-windows-active-directory-tools/free-active-directory-tools-index.html
For more detailed audit reporting you might also checkout ManageEngine ADAudit Plus - Active Directory change audit and reporting solution. http://www.adauditplus.com.
Hope this helps.
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