The paper studies the role of co-orientation, i.e., the alignment of attitudes and activities, in the development of collaborative business processes and how a facilitator can support the emergence of co-orientation and the organizing of collaboration. The development of collaborative business processes is seen as a communicative process of collaborative organizing. Conversations in a co-creative workshop are analyzed to understand the process. The paper sheds light on communication tactics that a facilitator can employ to enable collaborative organizing of inter-organizational business processes towards sustainability.