Wing FTP Software

I have a fully functional domain controller (Windows server 2019), domain clients, and a member server with Wing FTP server installed.

I have a service account in Active Directory called: "Binduser" in the OU "Service Accounts".

Based on that I filled in the fields in the "Authentication Settings" tab.



When I then tap on "Connection Test" Wing FTP server says:

"Could not connect to the LDAP server!"



I have done a query via ldp.exe for the user "Binduser" and to my knowledge the authentication is successful.



The actual users that need to have access to the ftp server are in a sub OU "Users" under the parent OU "Production" in the directory.

"ou=Users,ou=Production,dc=rsha,dc=de"

But I can't enter that line anywhere in Wing FTP server.

Any ideas what I'm missing?

Thanks in advance.

Cheers!

OK, I just took a look on your screenshots, it seems the bind DN is wrong: cn=Binduser,ou=Service Accounts dc=rsha,dc=de
It should be: cn=Binduser,ou=Service Accounts,dc=rsha,dc=de

And the filter string would usually be: (&(objectClass=user)(sAMAccountName=%s))

If still no success, please change the port into: 3268

I correct the Bind DN line, tried port number 3268 and change the user Filter.
Unfortunately that didn't work, still have the same error 'Could not connect to the LDAP server!'