mounting NFS4 exported home directory

Hello, I am trying to mount an nfs share and getting permission denied.

Server is Ubuntu16LTS and the export is

/home   xx.xx.xx.xx(rw,insecure,sync,no_subtree_check,sec=krb5)

Client is MacOS Sierra and automount is:

*      -fstype=nfs,sec=krb5,rw         128.40.150.110:/home/&

on the server I get:

Sep 29 12:06:29 ubuntu16-yh rpc.mountd[4805]: authenticated mount request from xx.xx.xx.xx:976 for /home/ucftxxx (/home)

but on client when executing 

cd /home/ucftxxx

I get

permission denied

both server and client are joined to AD by Centrify Express, so I would think the user (ucftxxx) would have the same id on both system and not expect permission denied issue.

any help?

Thanks,

Yusah.