Thanks for fast reply,

I run the command with my base and get
ldap_bind: Invalid credentials (49)

than run the command exactly how you wrote and get
sambaSID: S-1-5-21-xxxxxxxxxx-xxxxxxxxxx-xxxxxxxxx-1203

First I think great that´s it.
But than I realize I know this sid.
So I run net getlocalsid on my LDAP server and get exactly the same sid but without
-1203.

Now I am a little confused.

Any explanation for this?
Thanks