I was configuring Samba and tried to add a domain user, but it returns this:

failed to add entry for the user student

These are the commands I've done so far:

frigate@frigate-desktop:~$ su 

Password: 

root@frigate-desktop:/home/frigate# nano /etc/samba/smb.conf 

root@frigate-desktop:/home/frigate# groupadd -g 201 machines

root@frigate-desktop:/home/frigate# mkdir -m 0775 /home/ntlogon

root@frigate-desktop:/home/frigate# mkdir /home/samba /home/samba/profiles

root@frigate-desktop:/home/frigate# chmod 1755 /home/samba/profiles/

root@frigate-desktop:/home/frigate# useradd -m test

root@frigate-desktop:/home/frigate# passwd test

Enter new UNIX password: 

Retype new UNIX password: 

passwd: password updated successfully

root@frigate-desktop:/home/frigate# smbpasswd -a test

New SMB password:

Retype new SMB password:

Added user test.

root@frigate-desktop:/home/frigate# smbpasswd -a root

New SMB password:

Retype new SMB password:

Added user root.

root@frigate-desktop:/home/frigate# smbpasswd -a student

New SMB password:

Retype new SMB password:

Failed to add entry for user student.

root@frigate-desktop:/home/frigate# smbpasswd -a student

New SMB password:

Retype new SMB password:

Failed to add entry for user student.

root@frigate-desktop:/home/frigate# smbpasswd -a stu

New SMB password:

Retype new SMB password:

Mismatch - password unchanged.

Unable to get new password.

root@frigate-desktop:/home/frigate# smbpasswd -a stu

New SMB password:

Retype new SMB password:

Failed to add entry for user stu.

How can I add this user to Samba?