Applies to: Samba 4.2.10 and up with adbindproxy 5.3.0.

Question: Would like to use the force user parameter in smb.conf but receiving the error message, "User name could not be found". How can this be fixed? 



Answer:
If the force user is a:

1)  Local user:
The local user must not be an AD user. The local user must also be a valid user for the share. 

2) AD user: 
The AD user must be Zone Enabled
The AD users primary group must be Zone enabled. 
These setting can be checked by using:
# adquery user <ADuser> -A

excerpt from smb.conf:
[result]
    comment = test
    valid users = centrifyimage.vms/testuser 
    path = /tmp/test
    public = no
    writeable = no
    browseable = yes
    guest ok = no    
    force user = centrifyimage.vms/testuser