E-business integration involves conducting business processes over the internet through e-commerce, intranets, and extranets. It poses challenges for authenticating tasks performed over the internet. Software as a service (SaaS) and cloud computing are commonly used in e-business, with SaaS allowing centrally-hosted software to be accessed via web browser. Customer relationship management (CRM) focuses on customer needs, satisfaction, and technology to improve customers and generate revenue. While e-business offers advantages like easier communication and marketing, it also presents disadvantages such as limited product information and less security compared to physical stores.