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SAMBA 4.24
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# Common mistakes with Samba-AD, tips and tricks

## Error when provisioning

    ERROR(<class 'samba.provision.ProvisioningError'>): Provision failed - ProvisioningError: guess_names: 'server role=auto' in /etc/samba/smb.conf must match chosen server role 'active directory domain controller'!  Please remove the smb.conf file and let provision generate it
    File "/usr/lib64/python2.7/site-packages/samba/netcmd/domain.py", line 474, in run
       nosync=ldap_backend_nosync, ldap_dryrun_mode=ldap_dryrun_mode)
    File "/usr/lib64/python2.7/site-packages/samba/provision/__init__.py", line 2046, in provision
       sitename=sitename, rootdn=rootdn, domain_names_forced=(samdb_fill == FILL_DRS))
    File "/usr/lib64/python2.7/site-packages/samba/provision/__init__.py", line 619, in guess_names
       raise ProvisioningError("guess_names: 'server role=%s' in %s must match chosen server role '%s'!  Please remove the smb.conf file and let provision generate it" % (lp.get("server role"), lp.configfile, serverrole))

The `/etc/samba/smb.conf` file created by the installation of the distribution package has not been removed as described in the documentation.

    wbinfo -c
    net ads join -U administrator
    net ads testjoin
    wbinfo -t

## Installing a schema extension in Samba-AD

    ldbmodify -H /var/lib/samba/private/sam.ldb /root/schema.ldif --option="dsdb:schema update allowed"=true