Modern Enterprise Resource Planning systems (ERPs) allow firms to integrate their information and control their departments. The ERPs are originally developed to handle a single firms production process, which means that their effects can be interpreted as affecting a firm intraorganizational. With the later growth of interorganizational usage of ERPs, something that is described as ERP2, firms can expand the ERP to include interorganizational usage (i.e. with different business partners). When doing so, the ERP design can’t only support internal routines, but it also have to adapt to the activities that are carried out with business partners. This article discusses the need to widening the perspective when examining ERPs in a business context; to not only involve intraorganizational or interorganizational issues, but to use both perspectives simultaneously. It also shows how the internal (intraorganizational) usage of the ERP can be interpreted as more rigid and governing than the use in the business interaction with others (interorganizational), which is more ad hoc. A case study indicates that the ERP use in the business interaction is less frequent or even dismissed and that other information systems (IS), suitable for the activities that are carried out with the business partners, are preferred. This highlights the need of considering the users needs, their activities, and their business interaction when designing ERPs that are support the business interaction with other firms.