In July 2026, the German state of Mecklenburg-Vorpommern confirmed it is replacing Microsoft SharePoint with a self-hosted Nextcloud deployment. 5,000 public-sector workers are already on the platform. The target is 50,000 — every employee across ministries, municipal offices, and public institutions in the state.

The software is AGPLv3. The state runs its own test and production environments. It conducts its own security audits. It applies its own stability updates. It built the project "Open Source by Design" — not as a slogan, but as an operational methodology: dedicated environments, operations training, security reviews, prioritized update pipelines.

The migration from SharePoint was phased and completed without data loss or disruption. File sharing first. Chat, video conferencing, and groupware next. That's the boring competence that makes a 50,000-user migration actually work.

Schleswig-Holstein: The Proof of Concept Already Scaled

Mecklenburg-Vorpommern is following a path that Schleswig-Holstein already walked. Schleswig-Holstein has been migrating to open source for ten years. By the end of 2025, the state had moved its entire email system — 44,000 mailboxes, 110 million emails and calendar entries — to Nextcloud.

The economics are concrete. Schleswig-Holstein's government reports saving over €15 million per year in licensing fees. The one-time migration cost was approximately €9 million. The payback period was under twelve months. The savings are reinvested into open-source development — a self-sustaining cycle for sovereign IT.

In November 2025, the two states signed a cooperation agreement. Same platform, same principles, shared experience. This isn't two pilots running in parallel. It's a regional alliance building a common open-source infrastructure stack for public administration.

Schleswig-Holstein's CIO, Sven Thomsen, has been direct about the reasoning: open standards, open source, and open interfaces are prerequisites for European IT resiliency. The state is also using Nextcloud's AI assistant for administrative processes — running on its own infrastructure, with no data leaving its controlled environment. That's not a feature pitch. It's a jurisdictional decision.

The Federal Government: €1.9 Billion and Counting

While two German states are walking away from Microsoft, the federal government is sinking deeper.

In late June 2026, Bundestag inquiries revealed that federal Microsoft licensing costs for 2025 exceeded €481 million. The cumulative total from 2017 through 2025 is over €1.9 billion. Costs rose 38% from 2024 to 2025 alone. Microsoft price increases ranged from 5% to 40% depending on the contract.

The revised figures are higher than previously reported because earlier accounting excluded indirect federal administration and grant recipients. The real number was always bigger. It was just counted differently.

This is the proprietary trap in its purest form. The federal government pays nearly half a billion euros per year for software it cannot inspect, cannot audit, cannot modify, and cannot control. The vendor sets the price. The vendor sets the terms. The vendor decides when to raise prices by 38%. The customer's only option is to pay.

Two state governments looked at this equation and walked. The federal government looked at it and stayed.

The Pattern Is Not Unique to Germany

The shift is happening across Europe, at scales that matter.

Île-de-France runs monlycée.net — a Nextcloud-based collaboration platform serving over 550,000 students, teachers, and administrative staff across the region's public high schools. This is a regional government providing sovereign infrastructure for its education system. Not Google Classroom. Not Microsoft 365. AGPLv3 software on infrastructure the region controls.

Austria's Federal Ministry for Economic Affairs, Energy, and Tourism migrated approximately 1,200 employees to Nextcloud in 2025.

SURF, the Dutch academic IT cooperative, deploys Nextcloud for 100,000 users across Dutch universities and research institutions.

Nextcloud's professional user base grew by over 2 million in 2025 alone. The company reported a 50% year-over-year increase in bookings in Q1 2026. Its partner network grew 300% in 2025. IONOS and Deutsche Telekom now offer managed sovereign cloud services on Nextcloud — for organizations that want the software without running the infrastructure themselves.

This is not a niche. It is a procurement trend driven by a combination of regulatory pressure (GDPR, the EU Data Act, the EU AI Act), cost pressure (Microsoft licensing inflation), and sovereignty pressure (the CLOUD Act, Schrems II, the ongoing inadequacy of the EU-US Data Privacy Framework).

What the German State Migration Actually Proves

The significance of Mecklenburg-Vorpommern and Schleswig-Holstein is not that Nextcloud is good software. It is. But that's not the point.

The significance is that these are production government deployments at scale, running on AGPLv3 software, operated by the government's own IT staff, with documented cost savings and no operational disruption. The argument that open-source collaboration platforms are "not ready for the enterprise" — an argument that has been made for twenty years — is now contradicted by 44,000 mailboxes in Schleswig-Holstein and 5,000 workstations in Mecklenburg-Vorpommern, scaling toward 50,000.

The argument that migration is too risky is contradicted by a phased rollout that completed with zero data loss. The argument that open source is too expensive is contradicted by €15 million in annual savings against €9 million in one-time costs. The argument that sovereign infrastructure is theoretical is contradicted by two German states that signed a cooperation agreement to build it together.

What This Means for Your Community

If you are running infrastructure for a community — a town office, a fire hall, a small business, a tribal administration, a school district — the lesson from northern Germany is straightforward.

The economics work. Schleswig-Holstein spent €9 million to save €15 million per year. That's a payback period measured in months, not years. The math is even more favorable for smaller deployments, where licensing costs are proportionally higher per user and infrastructure requirements are lower.

The migration approach works. File sharing first, collaboration second. Don't attempt a big-bang migration. Phase it. Let people learn the platform on one workflow before moving the next. The German states did this and reported zero disruption. The communities we work with should do the same.

The AGPLv3 matters. Nextcloud's license is not incidental. It is the legal mechanism that ensures the software remains auditable, modifiable, and free. A community that deploys Nextcloud can inspect what the software does with its data. A community that deploys SharePoint cannot. When the software handles member records, financial transactions, or communications, the ability to audit is not a feature. It is a requirement.

Cooperation scales. Two German states signed an agreement to share a platform. The same model works for communities. Three town offices on the same Proxmox cluster running the same Nextcloud instance, administered by someone who knows the stack, is more sustainable than three independent Microsoft 365 subscriptions administered by nobody. Federation is not just a protocol. It is a governance model.

The federal government's €1.9 billion is the cost of not doing what Mecklenburg-Vorpommern and Schleswig-Holstein did. That cost is being paid by taxpayers who have no say in the decision. The communities we work with have a say. The question is whether they use it.