The Dutch tax authority has scrapped its planned migration to Microsoft’s cloud services, deciding that handing its digital infrastructure to an American technology giant might not be such a brilliant idea.
The Netherlands Tax and Customs Administration will abandon its Microsoft 365 rollout in favour of locally managed servers and European open-source software. The decision covers the country’s tax authority, customs administration and benefits agency, which collectively employ approximately 47,500 people.
Dutch State Secretary for Finance Eelco Eerenberg confirmed the change in a letter to parliament, explaining that the agencies would move email and calendar services to infrastructure under their own control during 2027. European open-source alternatives for personal storage and collaboration are scheduled to follow later in 2027 and throughout 2028.
The decision represents a substantial reversal for a government organisation that had previously insisted Microsoft 365 was effectively its only realistic option. As recently as 2025, officials argued that replacing the American software with a European alternative would be impractical, apparently overlooking the possibility that technology might exist outside Vole’s catalogue.
The migration had already begun, with approximately 5,000 employees transferred to Microsoft 365 before the rollout was suspended. An independent government technology review subsequently warned that the project would leave the organisation excessively dependent on one supplier, without a sufficiently convincing escape route.
Eerenberg said the revised approach became possible partly because the tax authority had expanded its own data centre capacity. The additional infrastructure means it can host essential services internally, removing the need to entrust those operations to Vole’s cloud.
The government intends to retain existing software licences wherever possible to minimise additional expenditure. The new strategy follows recommendations from the Dutch Advisory Council on ICT Assessment, which urged officials to examine individual software functions and avoid tying the entire organisation to a single provider.
Complications remain, particularly with document archiving and records management. Some features included in Microsoft’s cloud platform have no equivalent in its locally hosted products, leaving government IT departments hunting for replacements and potentially delaying parts of the modernisation programme.
The dispute reflects growing European concern about dependence on American technology companies, particularly where government services and sensitive information are involved. Dutch politicians have questioned whether US political pressure could disrupt access to essential cloud services, leaving government departments in an uncomfortable position.
The tax authority’s change of direction comes as the Netherlands pursues broader digital independence. Government developers are working on a Linux-based desktop environment, while other European organisations are examining alternatives to American cloud infrastructure and proprietary software.
The decision has already affected another major IT project, with the tax authority taking control of hosting for its replacement VAT system. That change has pushed the VAT refund system’s planned launch to April 2027, while the domestic VAT rollout has slipped from July to the third quarter of 2027.
Eerenberg discussed the government’s plans with Dutch MPs on 7 October, and further details on the migration and its costs are expected as the departments develop their replacement systems.
