I think something recently changed on Ubuntu 20.04 where I’m now having to put 

Domain = my.domain.com

In /etc/idmapd.conf or run ipa-client-automount to have that do it for me.

No matter, my issue is I effectively have to reboot after making the change. 

I can restart sssd, all the rpc* services I can find and no matter what i restart when I “ls -l /mnt/nfs_share”. Everything is still owned by nobody:nogroup.

I have unmounted and restarted all the services I can find and same issue.

If I reboot the whole server and 

Domain = my.domain.com

Is in the the conf file, it works.

No matter what services I restart in the client nothing makes it work until I reboot. I’ve tested it by removing it, get the nobody:nogroup and then putting it in the config, restart all the services and nothing fixes it.

Reboot the machine and magically it’s back working.

What services am I missing that I need to restart for force this thing to pick up user and groups on the NFS share? 

sssd
rpc-gssd 
rpcbind 


-Kevin