M365 Global to 21Vianet migration in Wuxi
Moving M365 Global to 21Vianet migration in Wuxi is rarely a straight copy of mailboxes. For a company operating in China it starts with a decision most markets never face: whether your users should sit on the global Microsoft tenant or the local service operated by 21Vianet — and then how to move between the two without losing mail flow, Teams history, or the audit trail your head office expects.
For foreign-owned companies in Wuxi we take the whole journey: audit, then tenant and licence design, then cutover, then the settling-in weeks when the odd fault surfaces. The aim is a migration nobody has to talk about afterwards.
Why M365 Global to 21Vianet migration in Wuxi is not like migrating anywhere else
Treat the two clouds as different products, because that is what they are. Licences differ, some features behave differently, and performance comes down to how traffic leaves your office and where it joins Microsoft’s network. Then there is the compliance angle: where personal data may legally sit, and what you can hand to a regulator or a head office when they ask.
Nobody touches a mailbox until the audit is done: what you are licensed for, how Domains and DNS are set, which mail rules exist, how Teams and SharePoint are genuinely used, how identity is configured, and where the devices are enrolled. A straightforward tenant move take a few weeks end to end.
What we migrate
- Mailboxes, mail flow and shared mailboxes
- Teams, channels and chat history, where the move allows it
- SharePoint and OneDrive content, with permissions checked before and after
- Entra ID, groups, sign-in policy and conditional access
- Endpoint policy and Intune device enrolment
- DNS records, domains, and the licence position on the new tenant
We move mailboxes first and collaboration content second, which keeps the team productive while the remainder follows.
How the project runs, step by step
- Establish what you have today against what the business genuinely needs
- Design the destination — tenant choice, licensing, routing
- Run a pilot group and record what actually changes for users
- Cut over in a planned window; we schedule it for a weekend
- Hypercare — we stay on through the settling-in period, while the small faults surface
- Hand over documentation, and support what we left behind
Where we work
We are not a single-city provider. NETK5 dispatches engineers across mainland China: our own team is based in Shanghai, Beijing, Guangzhou and Hong Kong, and we staff projects elsewhere in the country as clients need them — Xi’an, Chengdu, Taixing and beyond. Outside China we have delivered rack-and-stack work and WiFi surveys in Japan, Korea, Singapore and Taiwan, usually for international companies coordinating several sites from a head office that has never been on site.
For M365 Global to 21Vianet migration in Wuxi that matters in a practical way: work can be planned around a visit rather than a relocation, and the same team that surveys or installs can hand over documentation the head office can actually use.
Where we have done this beforeSince 2002 we have looked after IT for international companies in China, and Microsoft 365 sits at the centre of most of it. We have run a pilot migration of Microsoft 365 from the global tenant to 21Vianet for a client operating in China, and we manage cloud estates day to day — including an environment of more than thirty Azure virtual machines with Microsoft 365 alongside it. Our clients include names such as Siemens, Nestlé, McKinsey and JLL, usually alongside the international IT companies whose client sites we support.
The questions that come up every time
Do we have to move to 21Vianet if we are in China?
It is a choice, not a requirement. Many foreign-owned companies stay on the global tenant and live with the trade-offs: performance, routing, and how easy it is to evidence how data is handled. We also handle moves the other way, from 21Vianet back to global, when a business restructures or exits. Your users, your regulator and your head office decide it, which is why the audit comes first.
How long are users without email?
Very little, if the cutover is planned properly: mail flow flips inside a window, users sign in again, work resumes. The time goes into the days afterwards — profiles, devices, shared mailboxes, and the odd Teams channel that behaves differently.
Can you support us after the migration?
Yes, and a good share of our migration work becomes ongoing support — helpdesk in English and Chinese, monitoring, and someone who already knows how your tenant was built.
Talk to us about M365 Global to 21Vianet migration in Wuxi
Tell us what you have now and what you need to end up with — tenant, users, sites, and any deadline driving it. We will tell you what the move involves and what it costs before anyone starts.
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