For fifteen years and in the context of the “modernization” of public services, French probation services have faced a reform process based on managerial principles. This movement has an impact on the redefinition of institutional rules. But one should also take into account the level of appropriation of these developments by probation officers. This essay aims to confront their feelings about the reforms (disappointment, opposition, confidence) with their attitudes towards the institution (exit, voice, loyalty). The issue is to consider the various individual adaptation registers that determine the consistency of these reconfigurations.