Netherlands Nixes Microsoft 365 for Open Source Solutions

The Dutch Tax and Customs Administration has decided to abandon its planned migration to Microsoft 365, opting instead for an open-source approach. This decision underscores a growing commitment to digital sovereignty within Europe.

Shifting Focus to Open Source

This announcement aligns with broader trends highlighted during the recent Open Source Summit Europe by the Linux Foundation (LF), where a significant portion of EU organizations expressed that digital sovereignty is a priority. According to the LF's report, 94% of organizations in the EU regard digital sovereignty as crucial, with more than half deeming it very important.

A Broader Movement Across Europe

The Netherlands is not alone in seeking alternatives to proprietary software. Several other European nations, including Switzerland, Austria, France, Germany, and Ireland, have made similar transitions toward Linux and open-source applications. Many are recognizing the value of controlling their digital environments amid increasing concerns over data privacy and security.

The planned switch to Microsoft 365 was originally intended for completion by the end of 2026, with about 5,000 employees already migrated. However, following a recommendation from the Dutch Advisory Council on ICT Assessment, the government decided to put the rollout on hold in July.

Challenges with Microsoft 365

The ICT assessment presented several significant concerns regarding Microsoft 365. Primarily, the chosen design was criticized for inadequate information security and risk to data confidentiality, particularly due to risks associated with storing data on American servers.

Additionally, issues regarding encryption were raised. The proposal to use standard Microsoft encryption fell short of the preferred Double Key Encryption, which would have granted more control over data security. Concerns were also expressed about the lack of default end-to-end encryption for Teams calls, a longstanding issue for the Dutch government.

Future Steps Towards Open Source

The government’s immediate plans involve retaining Microsoft software for its email and calendar needs while transitioning to open-source alternatives for personal storage and collaboration platforms. In 2027, they expect to implement a local mail and calendar service and introduce European open-source solutions later on.

The specifics of these open-source tools are still pending. However, other Dutch government branches are working on creating what they call *Digitaal Autonome Werkomgeving Overheid* (Digital Autonomous Work Environment for Government), which aims to replace the Windows desktop with the NixOS Linux distribution.

The potential software options being evaluated include France’s La Suite and Germany’s openDesk. There is also discussion about developing a tailored solution, known as MijnBureau, which would consist of various open-source applications like Nextcloud, Collabora, Element, and OpenProject.

While it remains uncertain what the full implementation will entail, the Dutch tax authorities' shift marks a pivotal moment in the ongoing transition to open-source software in governmental operations. This decision reflects a commitment not only to digital sovereignty but also to the broader European objective of enhancing the security and control of public-sector technology.