The aim of the work described in this paper is to set up the as-is enterprise model continuous updating process and to develop a supporting tool. The as-is enterprise model continuous updating process uses the annotations as a mechanism to put the business actors "talking" with the representation of their activities, either in action and interaction contexts, extracting knowledge and turning it explicit in the as-is enterprise model. The business actors can act as active updaters of the as-is model through the comparison between the modelled activities and the ongoing real executed activities. In this way, the enterprise model, which represents several aspects and perspectives of organizations, can help building and maintaining organizational self-awareness by adding knowledge to several organizational levels (individual, group, process/functions). The process and the supporting tool are running in a governmental organization and the results revealed that they could have an important role, not only in gathering the information needed to update the model, but also allowing the opening communications channels to share and acquire additional organizational knowledge.