Hi @mathias.persson .
You should be getting a “Failed login” entry in the Auth0 logs for wrong username/password attempts (at least in scenarios where Auth0 is the one asking for the credentials). Are you not seeing those?
creating a connection between each AD (we could potentially have one per customers)
Be aware that the AD/LDAP Connector is designed for scenarios where your company controls the AD/LDAP server. The connector should not be installed on your customer’s servers. For B2B scenarios where you want to allow your customer’s users to access your applications using their enterprise credentials, you should be connecting to your customer’s federation service (like their own Auth0 service, ADFS or any SAML identity provider) using one of the other available enterprise connections.
Installing an AD/LDAP connector on your customer’s premises connected directly to your Auth0 domain means that you are handling the passwords of your customer’s users directly. We don’t support these types of deployments and recommend strongly against them.
(I just sent a PR to our AD/LDAP Connector docs to add this exact warning).