Office 365 migration in Nanjing
Moving Office 365 migration in Nanjing 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.
We run the whole sequence for foreign-owned companies in Nanjing: audit first, then tenant and licence design, then the cutover, then the weeks of settling-in while the small faults surface. Nobody enjoys a migration; the job is to make it unremarkable.
What makes Office 365 migration in Nanjing a different project
People assume the global tenant and the China service differ only in where the servers sit. They don’t: licensing, feature behaviour and routing all vary, and performance is a function of how your traffic reaches Microsoft’s network. Layer the compliance question on top — what you may store where, and what you can demonstrate — and you have a design problem rather than a copy operation.
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.
The scope we move
- User and shared mailboxes, plus the mail-flow rules around them
- 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
- Devices and policy, including Intune enrolment
- Domains, DNS records and the licensing picture on the destination tenant
Exchange mailboxes move first, then the collaboration content, so people keep working while the rest follows.
How a migration runs
- Audit the current tenant and the actual business requirements
- Settle the destination design: tenant, licensing, routing
- Run a pilot group and record what actually changes for users
- Cut over in a planned window; we schedule it outside business hours
- Hypercare — we stay on through the settling-in period, while the small faults surface
- Leave you with documentation, and keep supporting the estate afterwards
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 Office 365 migration in Nanjing 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 beforeWe have supported international businesses in China since 2002, and Microsoft 365 is at the centre of nearly all of it. That includes a pilot migration from the global tenant to 21Vianet for a client operating in China, and the ongoing management of cloud estates — among them more than thirty Azure virtual machines running alongside Microsoft 365. Siemens, Nestlé, McKinsey and JLL are among the names we work with, typically alongside the international IT companies whose client sites we support.
Questions we get asked
Do we have to move to 21Vianet if we are in China?
No. Plenty of foreign-owned companies run on the global tenant and it works. The trade-offs are performance, routing, and how comfortably you can evidence data handling. Some migrations go the other way — from 21Vianet back to global — when a company restructures or leaves. The right answer depends on your users, your regulator and your head office, 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 Office 365 migration in Nanjing
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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