Yes, your Active Directory (2003 R2 Server) is indeed an LDAP server by design. Microsoft implemented AD as an LDAP directory service with extensions. The standard LDAP ports for AD are:

• 389 - Unencrypted LDAP
• 636 - LDAPS (SSL encrypted)
• 3268 - Global Catalog (unencrypted)
• 3269 - Global Catalog SSL

The port 19389 you mentioned is typically used for ADAM (Active Directory Application Mode) or LDS (Lightweight Directory Services), not standard AD. For regular AD LDAP connections, you should be using port 389.

# Python example using python-ldap
import ldap

try:
    l = ldap.initialize('ldap://your_domain_controller:389')
    l.simple_bind_s('user@domain.com', 'password')
    search_base = 'dc=domain,dc=com'
    query = '(objectClass=user)'
    results = l.search_s(search_base, ldap.SCOPE_SUBTREE, query)
    for dn, entry in results:
        print(f"DN: {dn}")
except ldap.LDAPError as e:
    print(f"LDAP Error: {e}")

Common reasons for LDAP connection failures to AD:

• Firewall blocking port 389
• Incorrect binding credentials (use UPN format: user@domain.com)
• SSL certificate issues if using LDAPS
• Anonymous binds disabled (default in newer AD versions)

While AD is LDAP-compatible by default, some configuration might be needed:

1. Ensure the "LDAP" service is running (it's part of AD DS)
2. Check network connectivity between your client and DC
3. Verify DNS resolution works for your domain

If standard LDAP isn't working, consider these approaches:

// C# example using System.DirectoryServices
using System.DirectoryServices;

var entry = new DirectoryEntry(
    "LDAP://your_domain_controller/DC=domain,DC=com",
    "username",
    "password");

DirectorySearcher searcher = new DirectorySearcher(entry);
searcher.Filter = "(objectClass=user)";

foreach(SearchResult result in searcher.FindAll())
{
    Console.WriteLine(result.Path);
}

For ADAM/LDS specific scenarios, you would indeed need to install those roles separately, but for standard AD operations, they're not required.

When using JXplorer with AD:

1. Host: FQDN of your domain controller
2. Port: 389
3. Base DN: e.g., DC=yourdomain,DC=com
4. User DN: CN=adminuser,CN=Users,DC=yourdomain,DC=com

Yes, your Active Directory 2003 R2 is fundamentally an LDAP server at its core. Microsoft implemented AD as an LDAP directory service with proprietary extensions. The standard LDAP ports for AD are:

389 (unencrypted LDAP)
636 (LDAPS - LDAP over SSL)
3268 (Global Catalog)
3269 (Global Catalog over SSL)

The port 19389 you're trying is non-standard. There are several possible reasons for the JXplorer connection failure:

• Using incorrect port (should be 389 for basic LDAP)
• Missing proper authentication credentials
• Firewall blocking LDAP traffic
• Need for SSL/TLS configuration

Here's how to properly configure JXplorer for AD LDAP:

Host: your.ad.server.domain
Port: 389
Base DN: DC=yourdomain,DC=com
User DN: CN=admin_user,CN=Users,DC=yourdomain,DC=com
Password: yourpassword

For PowerShell users, try this LDAP query example:

$searcher = [ADSISearcher]"(&(objectClass=user)(sAMAccountName=*))"
$searcher.SearchRoot = [ADSI]"LDAP://DC=yourdomain,DC=com"
$searcher.FindAll() | ForEach-Object { $_.Properties }

ADAM (Active Directory Application Mode, now called AD LDS) is only needed when:

• You require a separate LDAP directory (not integrated with domain auth)
• Need to extend schema without modifying production AD
• Want to run multiple directory instances on one server

Check these diagnostic commands:

# Test basic LDAP connectivity:
telnet your.ad.server 389

# Check for LDAPS support:
openssl s_client -connect your.ad.server:636 -showcerts

# View AD ports in use:
netstat -ano | findstr "389 636"