Notification is an important feature in Internet applications. Traditionally, emails, phone calls, and short messages are widely used to send notification. However, they are not flexible enough and do not have the capability to provide enough information. Nowadays, instance messaging is adopted into many platforms providing real-time notification and session-based, it can be used as notification client to receive message. Besides, instance messenger can not only receive information but also provide query functions those are not easy to implement in email, phone calls, and short messages systems. In this paper, we propose architecture to use instant messaging as the notification method in enterprises. It is ubiquitous, friendlier to use, and naturally a query interface for users to find advanced notification information. The next generation notification system, based on Service-Oriented Architecture, collects and processes information from web services on existing systems. Then, it will deliver them to the subscribed users with instant messengers. Users, then, can receive notification anytime with his preferred instant messenger software.