Established in 1850, American Express is enjoying great popularity as it has more than 115 million cardholders at the global level. In fact, its popularity is increasing at a stunning level. There are plenty of reasons for using the services of American Express. Business loans, credit cards, travel services are some of its domain of expertise . Even though Amex (short form) is a reputable financial service provider, sometimes users react bitterly when they find that Amex login not working.