“Microsoft Partner like them are rare — few can truly meet the demands of corporate headquarters. They possess deep expertise in Microsoft cloud solutions, from Kubernetes to IoT and Cognitive Services, setting them apart from traditional partners who only provide licenses. Their strength lies in both technical understanding and implementation capabilities.”
IT Manager
Company in China, name withheld
Microsoft 365 and Azure Partner for Companies in China
Our Microsoft cloud services offer a comprehensive range of solutions that encompass everything from everyday office tasks to cutting-edge artificial intelligence, aimed at providing businesses with a seamless and integrated technological experience. Our offerings integrate the efficiency of Office 365 tools, the powerful computing capabilities of Azure, and the advanced technology of AI, catering to businesses of varying sizes and needs. Whether it’s handling day-to-day documents, analyzing big data, or developing intelligent applications, our solutions ensure flexibility, security, and efficiency. With these integrated services, we assist businesses in intelligently managing data, automating business processes, while ensuring information security and compliance. Opting for our Microsoft cloud services opens the door to the future for your business, making innovation and efficiency a norm in everyday work.
Microsoft Solutions Partner for Data & AI (Azure) and Infrastructure (Azure). View our partner profile on Microsoft Marketplace →
What Solutions We Offer as a Microsoft Partner
We offer standard procedures as well as personalized services.
Teams Direct Routing
For the limitations of Teams Call Plan in China, Malaysia, Vietnam, or other locations, Direct Routing with our Cloud SBC solution makes it easy to integrate with your existing phone number and Teams accounts.
Azure OpenAI
For companies in China that cannot use OpenAI's ChatGPT or APIs directly, we provide Microsoft Azure OpenAI Service through global Azure. It needs no complicated access setup, and pricing follows Microsoft's official Azure price list.
Azure Solutions
We provide Azure subscriptions with solutions for Webapps, containers, Kubernetes, IoT hub, cognitive services, text-to-speech, speech-to-text, and even Azure OpenAI services.
Power Platform Programming
Within the low-code platform combining Power Automate, Power Apps, Power BI, and Power Virtual Agents, we can build your workflows much easier than before.
Microsoft License Management
With our consulting, we provide open license to make license genuine with the most price-effect package to balance the budget and compliance
Best Reasons To Choose Our Services
Rich experience in both WFoE and government market.
A stable local technical team comprised of energetic young people who are eager to learn new technologies to improve service quality, reaction time and efficiency.
Government Customer
“They sent out 7 engineers overnight for a continuous week to help us deploy antivirus software urgently on all 500 computers and trace the compromised host.”
Corporate Customer
Due to budget constraints, we implemented only some of the recommended safety precautions. However, those implemented prevented a near successful man-in-the-middle attack and protected our finances from fraudulent transfers.
Work Cases
This is how we work together
Cybersecurity Skills Competition
Actively participate in the Cybersecurity Skills Competition.
Emergency Drill
Drills test readiness for emergencies by simulating scenarios, identifying improvement areas, and ensuring preparedness.
Penetration Test
A Penetration Test is used to discover undisclosed vulnerabilities within a targeted system.
Customer results
Selected DELine projects in this area. Client names are withheld; figures come from our project and ticket records.
Microsoft 365
Microsoft 365 that grew with the company: from 70 to 220 users
70 → 220
Microsoft 365 users, 2022–2024
Client: A German-owned machinery manufacturer near Suzhou. Name withheld.
Need: The company needed Microsoft 365 licences that could grow with its workforce, mail filtering, and its mailboxes moved to Exchange Online.
What we did: As a Microsoft CSP partner, DELine has supplied and managed the company's Microsoft 365 subscriptions since 2022, in both the global and the 21Vianet-operated editions, added Exchange Online Protection for 400 mailboxes and migrated the mailboxes to Exchange Online in 2024 with background synchronisation before the cut-over.
Result: The subscription grew from 70 users (October 2022) to 180 (January 2023) and 220 (October 2024), and is renewed every year.
Azure in China
Azure China environment with site-to-site VPN and web application firewall in 12 weeks
12 weeks
from order to handover
Client: A German-owned industrial equipment company in Guangdong. Name withheld.
Need: The company needed its applications hosted in China on Azure operated by 21Vianet, reachable securely from its office.
What we did: DELine opened the Azure China account, built a terminal server with RDS licences, connected the office with a site-to-site VPN and put the website behind a cloud web application firewall, then took over operations with a 5×8×4 Azure helpdesk and 7×24 PRTG monitoring.
Result: Delivered between August and November 2024. Four support tickets in the first contract year, all closed; the contract was renewed in 2025 and 2026.
Azure
Azure operations for a German software company since 2023
3 years
continuous Azure service
Client: An e-commerce software company, contracting directly from its parent company in Germany. Name withheld.
Need: The company needed Azure capacity on a predictable prepaid basis, with the infrastructure watched around the clock.
What we did: Prepaid Azure consumption managed by DELine, a 5×8×4 Azure infrastructure helpdesk, 7×24 PRTG monitoring and Microsoft Entra ID P1.
Result: Running since September 2023 and renewed each year. No support tickets were raised in the contract period.
Global Microsoft 365 or Microsoft 365 operated by 21Vianet?
Companies in China can use two separate Microsoft 365 clouds. The right choice depends mainly on where your headquarters tenant is and where your data must stay.
Global Microsoft 365
Operator: Microsoft.
Data location: Microsoft's global data centers, by tenant region.
Tenant and identity: can be part of your group's global tenant.
Collaboration with HQ: same tenant, so Teams, SharePoint and mail are shared.
Access from China: crosses the international internet; usually needs optimized, compliant connectivity.
Features: full global feature set.
Purchase: Microsoft or Microsoft partners.
Typical fit: subsidiaries that must stay in the group tenant.
Microsoft 365 operated by 21Vianet
Operator: 21Vianet (世纪互联), under licence from Microsoft.
Data location: data centers in mainland China.
Tenant and identity: separate cloud and separate tenant; cannot join a global tenant.
Collaboration with HQ: cross-cloud collaboration is limited and needs extra setup.
Access from China: local access inside China.
Features: a subset; some features arrive later or are not offered. Check Microsoft's documentation.
Purchase: 21Vianet and its partners, with RMB invoicing.
Typical fit: China-focused companies, or data that must stay in mainland China.
DELine is a Microsoft CSP partner and supplies both global Microsoft 365 and Microsoft 365 operated by 21Vianet, together with tenant setup, migration and the network needed to use global Microsoft 365 from China. Licence prices follow Microsoft's official list prices: see Microsoft's comparison of the China and global versions and global business plans. Rates for non-SLA service work are on our price page.
Microsoft 365 and Azure in China – frequently asked questions
Should a China subsidiary use global Microsoft 365 or the 21Vianet version?
If the subsidiary must share mail, Teams and SharePoint with headquarters, it normally stays in the group's global tenant. If data must remain in mainland China or the company works mainly in China, the version operated by 21Vianet can fit better. The two clouds are separate tenants.
Can we move from one Microsoft 365 version to the other later?
Yes, but it is a migration between separate tenants, not a switch. Mailboxes, files and Teams data have to be moved and users set up again, so plan it as a project.
Why is global Microsoft 365 slow in our China office, and what fixes it?
Traffic to Microsoft's global data centers crosses the international internet from China. A licensed, optimized network path such as DELine's Fastlane SD-WAN usually improves Teams and SharePoint performance.
Can we use Azure OpenAI in China?
Yes. DELine provides Microsoft Azure OpenAI Service on global Azure for companies in China that cannot use OpenAI's services directly.
Can DELine help with Microsoft Teams calling in China?
Yes. Where Microsoft Teams Calling Plans are not available, DELine connects Teams to existing phone numbers through Direct Routing with a cloud SBC.
Related guides
Practical articles from DELine on this topic.
Exchange Server
China’s MPS Order 176: Patch Exchange Server 2019 or Move to the Cloud?
What Order No. 176 means for companies still running Exchange Server 2019, and how to weigh patching against migrating.
Microsoft 365
Microsoft Warns of Cloud Storage Attacks: What Microsoft 365 Security Teams Need to Check
Why Microsoft 365 security cannot stop at the sign-in page once an attacker controls an identity.
SharePoint
SharePoint Under Siege: Five CVEs Exploited in Three Months
Five SharePoint Server vulnerabilities joined CISA’s KEV catalog between April and July 2026. What that means for enterprise security.
Would you like to learn more about how we can support?
You can make an appointment with us for an on-site discussion, or we can come to your company for an on-site inspection, to jointly explore your security needs.
