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NFSv4 mount incorrectly shows all files with ownership as nobody:nobody

Solution Verified - Updated 2018-04-12T20:30:41+00:00 -

Issue

From the client, the mounted NFSv4 share has ownership for all files and directories listed as nobody:nobody instead of the actual user that owns them on the NFSv4 server, or who created the new file and directory.
Seeing nobody:nobody permissions on nfsv4 shares on the nfs client. Also seeing the following error in /var/log/messages:
How to configure Idmapping for NFSv4

nss_getpwnam: name 'root@example.com' does not map into domain 'localdomain'

Environment

Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
NFSv4 share being exported from an NFSv4 capable NFS server

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