Binddn for user root not found

After successfully completing a test installation, I was unable to successfully migrate from Virtual-Box to ESXi/vSphere.

So yesterday I re-installed all of them on the ESXi/vSphere.
First the AD master, then two AD backups, which will later offer Kopano and SMB shares.

Installation and JOIN went smoothly. Then I installed the AD-compatible domain controller on all three machines. First on the master, then the backups. That too ran without problems.

root@mannheim:~# univention-check-join-status
Joined successfully

(on both AD backups)

But if I want to set up a file share, it doesn’t work. The directories are created, but the rights are not set correctly.

An “univention-join” results in the following output on both AD backups:

root@mannheim:~# univention-join
univention-join: joins a computer to an ucs domain
copyright (c) 2001-2018 Univention GmbH, Germany

Enter DC Master Account : root
Enter DC Master Password:

Search DC Master:                                          done
Check DC Master:                                           done
Stop S4-Connector:                                         done
Stop LDAP Server:                                          done
Stop Samba Server:                                         done
Search ldap/base                                           done
Start LDAP Server:                                         done
Search LDAP binddn Insufficient access (50)

* Join failed!                                                           *
* Contact your system administrator                                      *
* Message:  binddn for user root not found.


you must use an LDAP account with univention-join. root is a local user on each machine and doesn’t exist in LDAP. Use administrator instead.

Kind regards,

please tell me what is the password of the root account