Dutch tax office cancels Microsoft 365, turns to open source
The gist
The Dutch Tax and Customs Administration scrapped its Microsoft 365 cloud rollout for open source.
The reversal puts digital sovereignty and vendor lock-in at Europe's cloud debate center.
How it unfolded
- 2025The Dutch Tax and Customs Administration selected Microsoft 365.
- Jun 2026Microsoft 365 had been introduced to about 5,000 of the administration's 47,500 employees across tax, customs and benefits services.
- Jun 29, 2026The Advisory Board on ICT Assessment published advice stating Microsoft 365 is unsuitable for the tax administration, citing inadequate information security arrangements.