Here's a basic example of how to update the HWFP of a registered host (application server) and then print the license for a given app using LMO. (This will update the HWFP for all apps registered on that host.) Let me know if you need more help!

using (Server s = Server.Connect("myLfdsMachine.domain.com", false))
{
	// Update hardware fingerprint for app server
	Database db = s.GetDatabaseByRealmName("myLicensingSiteName");
	db.LoginWindows();

	int LookupHostIdByName(string hostName)
	{
		List<Host> hosts = db.GetAllHosts();

		foreach (var host in hosts)
		{
			if (host.Name == hostName)
			{
				return host.ID;
			}
		}

		return -1;
	}

	var appServerHostName = "myAppServer.domain.com";

	Host readHost = db.GetHost(LookupHostIdByName(appServerHostName));
	readHost.Fingerprint2 = "myNewFingerprint";
	readHost.Update();


	// Print new license for a given app
	Guid applicationId = new Guid("myLaserficheApplicationGuid");

	Version version = null;
	byte[] licBytes;

	Application application = db.GetRegisteredApplication(applicationId);
	version = application.Version;
	licBytes = application.GetLicense(null, LicenseType.Xml);

	string result = System.Text.Encoding.UTF8.GetString(licBytes);

	Console.WriteLine(result);
}