[Samba] Problem migrating to new Samba server

[Martin Campbell]

I have found the problem. It's AppArmor. Any directory I want to share 
needs to be added to the usr.sbin.smbd AppArmor profile:
I added the line:
/home3/shareddocs/** lrwk,
to the file:
/etc/apparmor.d/usr.sbin.smbd
followed by the command:
sudo apparmor_parser -r /etc/apparmor.d/usr.sbin.smbd