ldapserver.js

const ldap = require("ldapjs");

const server = ldap.createServer();

server.bind("", (req, res, next) => {
  console.log(`Bind attempt with ${req.dn.toString()}`);
  res.end();
  return next();
});

server.search(
  "",
  (req, res, next) => {
    console.log(`Bind attempt with ${req.dn.toString()}`);
    return next();
  },
  (req, res, next) => {
    console.log(`In the search with ${req.dn.toString()}`);

    res.send({
      dn: `CN=user, OU=myorg`,
      attributes: {
        userPrincipalName: "userPrincipalName",
        cn: "userCn",
        objectClass: ["user"],
        objectCategory: ["user"]
      }
    });
    res.send({
      dn: `CN=user2, OU=myorg`,
      attributes: {
        userPrincipalName: "userPrincipalName",
        cn: "userCn",
        objectClass: ["user"],
        objectCategory: ["user"]
      }
    });

    res.end();
    return next();
  }
);

server.listen(1389, () => {
  console.log(`LDAP started`);
});

package.json

{
  "scripts": {
    "start": "nodemon ldapserver.js"
  },
  "dependencies": {
    "ldapjs": "^1.0.2"
  },
  "devDependencies": {
    "nodemon": "^1.19.1",
    "prettier": "^1.18.2"
  }
}