This problem usually results from over-configuring the export options file.
If you want only to export custom recipients from Exchange, then start by
using the following format in the export options file:
[Export]
Basepoint=/o=<Org Name>/ou=<Site Name>/cn=Recipients
Container=<Recipients, or the subcontainer of Recipients that has the
Custom Recipients>
ExportObject=Remote <Remote exports Custom Recipients only>
NOTE: note there should be no spaces between the object parameters
Do not put an entry for HomeServer, because this will result in a CSV file
that contains only headers and no other information. For more information
about this, see Microsoft Knowledge Base article
147854, "XADM: Custom
Recipients DIR Export Creates Headers-Only CSV".
For more information about command-line export and the export options file,
see the online Help (Admin /?) and pages 476-482 in the Microsoft Exchange
Server Administrator's Guide.