> ## Content Index
> Fetch the complete content index at: https://sovereigntymonitor.eu/llms.txt
> Use this file to discover other available public pages before exploring further.

# Dutch tax authority drops Microsoft 365 migration for on-premises and EU open source
- URL: https://sovereigntymonitor.eu/news/2026-10-05-netherlands-belastingdienst-drops-microsoft-365/
- Published: 2026-10-05T12:00:00.000Z
- Updated: 2026-10-17T03:48:29.000Z
- Description: Dutch State Secretary Eelco Eerenberg told parliament the tax, customs and benefits services will abandon their Microsoft 365 migration. They will use on-premises servers and European open source tools from 2027, after expanding datacentre capacity.
- Author: Reidar Balstad
- Tags: Compute and infrastructure, Policy and law, #news, #verified, #ai-drafted

Verified AI-drafted [Tweede Kamer, Kamerbrief "Toekomstbestendigheid Belastingdienst" (State Secretary Eelco Eerenberg), 5 October 2026](https://www.tweedekamer.nl/kamerstukken/brieven%5Fregering/detail?id=2026Z21114&did=2026D48732&ref=sovereigntymonitor.eu)

**What it does not test.** It does not commit the Belastingdienst to a full exit from existing Microsoft licences, nor confirm which open source tools are chosen for 2027 and 2028.

**How this item counts.** Towards autonomy: it changes who owns, who operates, whose law governs. Binding 1 of 3 (announced), scale 1 of 3 (small), Verified counts in full: weight +3 of 36 possible. NL tax agency plans exit from Microsoft 365 to on-prem/EU open source from 2027; single agency. [European Sovereignty Index](https://sovereigntymonitor.eu/sovereignty-index/)

**How this item was made.** Drafted by an AI system (Claude (Anthropic)) from the source cited above and published under the editor’s responsibility without a person reading it first. [How the record is made](https://sovereigntymonitor.eu/method/#how-the-record-is-made)