This research aims to evaluate and highlight the architecture of established working behaviours and practices based on the change in the working model imposed by the pandemic emergency in the public sector. So, the research investigates how smart working, and its impacts alter the processes of sharing organizational knowledge, according to the introduction and application of technologies in the working life of public employees. After the intervention of an exogenous shock, such as the pandemic, the related availability, perceived usefulness, and ease of use can change considerably in this regard. Starting from the Technology Acceptance Model (TAM) and, in parallel, the Theory of Planned Behaviour (TPB), the authors intend to interpret reality through the lens of multifaceted aspects, reasoning in detail by a perspective based on complexity and non-linearity featured periods. Specifically, the authors investigate: i) how the perception of the use of digital tools in the workplace has changed from the pre-pandemic to the post-pandemic period in the public sector ii) how and in which way digital tools continued to be used after the critical phase of the Covid-19 health emergency.