The Dutch tax office has announced it will abandon Microsoft 365 cloud services, moving its email and calendar systems to on-premises infrastructure in 2027. The migration is part of a broader push toward digital sovereignty, with European open source tools expected to be adopted in a later phase.
The decision follows a pattern among European public-sector bodies reassessing reliance on US-based cloud providers. The tax office's plan prioritises control over data and systems, though the Register's report does not detail specific technical or contractual reasons for the move.
No competing sources were available, so the account rests solely on the Register's reporting. The timeline and tooling choices are clear, but the practical challenges of migrating a large government organisation off Microsoft 365 are not addressed in the source.