Hi Jan,
On Mon, 2021-07-05 at 15:35 +0200, Jan Kowalsky wrote:
 a couple of weeks ago I experimented with fusiondirectory and debops
 schema. Everythink worked so far with some special configuration.
 
 But now I encounter a new problem. While adding new entries via
 fusiondirectory works, editing of existing entries leads to renaming
 of distinguished name: 
It's been some time since I last used the Fusiondirectory web LDAP
manager, but I believe that it requires a certain LDAP directory
layout. One that is probably incompatible with debops.slapd.
For what it's worth, I (and I believe Maciej too) use Apache Directory
Studio as a graphical interface for LDAP servers: 
https://directory.apache.org/studio/
Cheers,
Imre