If you wish to use the mxisd Identity Server for LDAP authentication instead of [matrix-synapse-ldap3](https://github.com/matrix-org/matrix-synapse-ldap3) consult [Adjusting mxisd Identity Server configuration](https://github.com/kamax-matrix/mxisd/blob/master/docs/features/configuring-playbook-mxisd.md#authentication).