How can NFSv4 server map uid without client using idmapd?

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http://forums.fedoraforum.org – My problem is that my NFS client accesses my Fedora 17 NFS server with a crazy user-ID. There is no practical way to change that client’s uid. I expected that the client would use the idmap client, but support for idmap was dropped in favor of LDAP. Great idea, but this platform mis-uses LDAP, and creates its' own uid from the user’s LDAP record. It’s actually even more painful than that, but I’m left with a bottom line: Given a NFS client that presents a known uid, how can I map that to the LDAP uid I know it is? Yes, I have been slogging through the NFS docs, but I can find no curr (HowTos)