Post

🧵 1/ Flex routing goes live today for EU/EFTA Copilot tenants. Check MC to validate your default. Your Copilot data could process out of region now...

9/4/26, 9:45 am0 reposts0 likes

Ben L

@ctrlaltben.com

9 Apr

2/ Microsoft is introducing "flex routing", a setting that lets EU/EFTA tenants use Copilot LLMs outside of their sovereign data boundary (i.e. in USA, Canada etc.) when they are having peak demand issues.

Ben L

@ctrlaltben.com

9 Apr

3/ The default state is per-tenant: 🔹 New tenants (post-25 March 2026): on by default 🔹 Existing tenants: individual MC posts communicate your tenant's default Mine (MC1269219) shows off by default, live from 17 April 2026. Yours could differ.

Ben L

@ctrlaltben.com

9 Apr

4/ Context: When Copilot joined the EU Data Boundary commitment in March 2024, the message was "EU traffic stays within the EU Data Boundary." Flex routing is the release valve, it lets MS satisfy demand from datacenter regions around the world as needed.

Ben L

@ctrlaltben.com

9 Apr

5/ Data at rest still stays in the boundary. Data is encrypted in transit. But if flex routing is on, prompts and responses may traverse to the US/Canada/Australia during peak load.