# CNRS switches 50,000 mailboxes to a French free software solution

> The CNRS is abandoning Microsoft and migrating 50,000 mailboxes to a French free software solution, amid a debate on digital sovereignty.

**In brief**: Cyber event (severity: low) nationwide, first detected on 4 November 2026 at 08:11. Reported by 1 source (2 articles), last updated on 4 November 2026 at 09:54.

- Category: Cyber
- Severity: Low
- Place: Nationwide
- First detected: 4 November 2026 at 08:11
- Updated: 4 November 2026 at 09:54
- Web page: https://acturadar.com/en/events/9251-cnrs-switches-50-000-mailboxes-to-a-french-free-software-solution

## Reported figures

- 3,5 millions d’euros

## Sources (2 articles)

- [Le CNRS tourne le dos à Microsoft et bascule 50 000 boîtes mail vers le logiciel libre français - Clubic](https://news.google.com/rss/articles/CBMi1gFBVV95cUxQOWp1Rm9vWUZzdDhva09IRldmMmVOXzZHNzQ4c2stY0JiN2NzYlc5cHg2Z1dQRHZEZ1RZNUNDRjhvbG5mZHBpT2x1MXlVbWFnUmEwVkZKZm5DaWx3NURFelV1RFJVQkQxVUZyUUthaURpSWIwSlpEMWdJWDREdUx4WkY0R1NhaFg3REVYMmF6bGhtUXhjWXAyS19NaXBKOGswdU4tc2RpMUtWd1ExQVJSZlEwcDhyTjhydTZKV2VEVklxMmZSdWFhYlRYV1J1a0UwODF0UExn?oc=5) — clubic.com, 4 November 2026 at 08:11
- [Souveraineté : le CNRS quitte Microsoft pour sa messagerie maison - Frandroid](https://news.google.com/rss/articles/CBMitgFBVV95cUxNYktRSzNnb2dVZHJwNG1CblFQV0ZSa2FOVjRLb2tydzJfVGpPSVQ4VGZBNHk4ZWxuV1FHdzFMM1lXbWtEaUFpMS1Cbmd0RFhoUlJTV2hYUnAxZVBXV09Tc2pxS2RYV3MxVk8zZUxCM0x5RE9SUlFxUGRueGt4NDlHMG9xeU9KMmxZdkI3M3RUNlFjWnNGazVLNkNObDctVUR0U29VY3dpc21kRUpEZXlXdzNaOHVDdw?oc=5) — Frandroid, 4 November 2026 at 09:54

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Cite as: Acturadar, “CNRS switches 50,000 mailboxes to a French free software solution”, https://acturadar.com/en/events/9251-cnrs-switches-50-000-mailboxes-to-a-french-free-software-solution
Methodology: https://acturadar.com/en/methodology