In the LDAP Servers tab, click + LDAP Server and add the following parameters for each LDAP server.

The identifier of each LDAP server must match an identifier configured in the Certificate Revocation list in LDAP server settings.

Mandatory: Yes.

Username

The user name for binding to the LDAP server. 

Mandatory: When the binding to the LDAP server is not anonymous.

Password

The user password.

Mandatory: When the user requires password authentication.

URL

The URL of the LDAP server in the following format:

ldap://<host>:<port>

For example:

ldap://ldap.example.com:389

Mandatory: Yes.