ldapsearch() is not giving results

Hello,

I am trying to fetch the users or details of particular user from AD and I am using ldapsearch() to achieve this, but I am facing issues to fetch the results

I have created 'scsExternalSystemKey' ad.test with below details

username:<full DN>

password:<password>

ldapsearch(
  config: {
    scsExternalSystemKey: "ad.test",
    usePerUserCredentials: false,
    url: "ldap://<IP>:389/DC=PSIAPPIAN,DC=com"
    
  },
  searchFilter: "(&(ObjectClass=organizationalPerson)(uid=administrator)",
  attributes: {},
  pagingInfo: a!pagingInfo(
    startIndex: 1,
    batchSize: - 1
  )
)

Output:

LdapResponse
    success: true
    result: DataSubset
        startIndex: 1
        batchSize: -1
        sort: null (List of SortInfo)
        totalCount: 0
        data: null (List of Variant)
        identifiers: null (List of Variant)
    error: null (Text)

I have tried multiple filters to fetch the result but none are working. Highly appreciated if I get any pointers on this. Thanks in advance.