Microsoft M365 in China: What You Need to Know
Using Microsoft 365 in China as an International Businesses in 2025
TL;DR (Quick Summary)
Can you use M365 in China? Yes, you can use Microsoft 365 in China, but not without some limitations. Microsoft services in mainland China are run separately by 21Vianet and offer different capabilities to the global cloud. You’ll need a dual-tenant strategy, tailored device management, and training for your staff to navigate the restrictions.
Operating an international business in China presents distinct IT challenges, especially when using cloud-based platforms like Microsoft 365. Due to China’s strict data sovereignty laws, Microsoft services in China are operated by 21Vianet, resulting in a separate, localised version of Microsoft 365 that differs significantly from the global tenant.
At PTS Managed Services, we help businesses understand these differences and implement IT strategies that comply with local laws while maintaining global productivity. Here's what you need to know.
Microsoft 365 Global and China Cloud (21Vianet)
Data Sovereignty and Regulatory Compliance
Global Tenant: Data is stored in Microsoft’s global data centres, governed by standards like GDPR.
China Tenant (21Vianet): Data is stored entirely within China to comply with local regulations. This isolation means Chinese and global tenants cannot share the same infrastructure.
Feature Availability and Product Gaps
Global M365: Includes full features such as Microsoft Teams Live Events, Audio Conferencing, Power Platform integration, and access to the latest productivity tools.
M365 in China: Many features are limited or unavailable, including:
Microsoft Teams Live Events
Power Automate connectors
Windows Autopilot
Integration with Google services
Limited Teams bots and third-party apps
⚠️ These feature limitations may impact workflow, especially for teams that rely on automation, hybrid work tools, or mobile device management.
Network Performance and User Experience
Users in China accessing Global M365: Often experience high latency, packet loss, and poor video call quality due to cross-border data routing and the Great Firewall.
China Cloud users: Benefit from faster, more stable access, but lose integration with global services.
Key Differences Between M365 Global Tenant and China Tenant
| Feature | Global Cloud Tenant | China Cloud (21Vianet) Tenant |
|---|---|---|
| Teams | Full functionality | Partial, reduced video quality |
| Microsoft Intune | Fully integrated | Not supported |
| Windows Autopilot | Supported | Not available |
| SharePoint / OneDrive | Seamless access | Slower performance, limited sync |
| Microsoft Defender | Fully supported | Not available |
| Azure AD Join / Entra ID | Global integration | Not compatible |
Using Outlook & Exchange Online in China
Outlook email remains one of the more stable components of Microsoft 365 in China, but performance and reliability depend heavily on your setup.
Outlook Web Access (OWA)
Frequently slow or time out without a VPN
Best used with desktop Outlook client instead
Exchange Online (Global)
Works with caveats: email routing is slower, and calendar syncing may lag
Use split DNS and consider local SMTP relays to improve delivery
Exchange via 21Vianet
Offers more stable performance within China but isolated from global tenant
Cannot share calendars across tenants
Recommendations
Route China users to desktop Outlook, not browser
Set expectations for delayed calendar syncs
For heavy users, consider local mail backup or archive tools
Microsoft Intune and Endpoint Management in China
Device Management Differences
Global Intune: Offers full functionality, including Android Enterprise support, Windows Autopilot, Exchange connectors, and telemetry.
Intune via 21Vianet: No support for Windows Autopilot
Implication for IT Teams
You’ll likely need to segment device policies between users in China and global users.
Global MDM policies may need to be customised or removed altogether for China-based devices.
Licensing, Support, and Updates
Global M365: Supported directly by Microsoft, with uniform global updates and roadmap features.
China M365: Supported by 21Vianet, not Microsoft directly.
Strategies for International Businesses Using M365 in China
To operate effectively across China and other regions, businesses must create a bifurcated IT strategy that considers both versions of Microsoft 365.
Recommended Approaches:
Local China Tenant for Mainland Operations: Ensures compliance and optimal performance.
Global Tenant for Other Offices: Maintains full feature access for teams outside of China.
Bridge Gaps with Process Design: Redesign workflows to accommodate limited integrations and support dual processes where needed.
Employee Training: Ensure your team understands the differences and potential workarounds.
Ongoing Monitoring: Stay informed on the evolving Microsoft and 21Vianet roadmaps.
Frequently Asked Questions
Can I use Microsoft Teams in mainland China?
Yes, but the experience is degraded. Audio may be stable, but video quality is often reduced, and features like background blur or breakout rooms may not function.
Is OneDrive available in China?
Technically yes, but performance is poor without a VPN. Syncing large files is unreliable.
Can I use Microsoft Intune or Autopilot for China-based devices?
No. Intune and Autopilot do not function in the China Cloud and will not work reliably for devices located in China.
How do I handle compliance and data protection?
Microsoft’s China Cloud (run by 21Vianet) keeps data within mainland China to meet regulatory requirements. However, this also limits interoperability with global tenants.
What’s the best way to structure our M365 setup?
Use a dual-tenant model: global Microsoft 365 tenant outside China, 21Vianet tenant within. Avoid sharing configurations between them. Train staff accordingly.
Need help deploying or optimising Microsoft 365 in China?
At PTS Managed Services, we support clients in Hong Kong, mainland China, and across APAC with:
Microsoft 365 deployment strategies tailored to China’s regulatory framework
IT architecture design that bridges global and local services
Procurement and configuration of compatible devices and licenses
Support for hybrid cloud and secure cross-border data flows
We understand the technical and operational limitations businesses face in China and help you plan proactively to avoid disruption.
Contact us at PTS Managed Services for expert guidance on cross-border IT strategy, compliance, and digital performance across China and Asia.
The information provided in this article is for informational purposes only and should not be construed as legal advice. While we strive to provide accurate and up-to-date information, it is important to consult with a qualified legal professional to address specific legal concerns and ensure compliance with all applicable laws and regulations in China and your home country. We do not assume any liability for actions taken based on the information provided herein.