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Netherlands Ditches Microsoft for Open Source
13 Oct
Summary
- Netherlands tax agency canceled Microsoft 365 public-cloud rollout.
- Concerns cited include security, data control, and vendor lock-in.
- An on-premises, open-source approach will be adopted by 2028.

The Netherlands' Tax and Customs Administration has officially abandoned its planned transition to Microsoft 365, signaling a strong commitment to digital sovereignty. This decision stems from critical concerns identified regarding information security, data processing control, and future-proofing. The agency cited issues with Microsoft's encryption standards and the lack of default end-to-end encryption for Teams calls as significant drawbacks.
Instead of the public cloud, the administration will implement an on-premises and open-source strategy. By 2027, email and calendar functionalities will be managed on-premises. Subsequently, European open-source solutions for personal storage and collaboration are slated for implementation in late 2027 and throughout 2028, aiming for a sustainable and autonomous digital environment.
This move aligns with a broader European trend favoring open-source technology and digital self-determination. Potential future solutions may involve developing a 'Digital Autonomous Work Environment for Government' (DAWO), potentially incorporating the Dutch Linux distribution NixOS and open-source suites like La Suite or openDesk.