Office 365 migration in Nantong

Moving Office 365 migration in Nantong 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 Nantong 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.

What makes Office 365 migration in Nantong a different project

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.

The audit comes before any mailbox is touched: licences, domains and DNS, mail rules, how Teams and SharePoint are genuinely used, identity configuration, and which devices are enrolled where. Most migrations then take a few weeks to cutover.

What we migrate

• User and shared mailboxes, plus the mail-flow rules around them
• Teams and channels, carrying chat history across where the move supports it
• SharePoint and OneDrive content, with permissions checked before and after
• Identity — Entra ID, groups, authentication and conditional access
• Endpoint policy and Intune device enrolment
• Domains, DNS records and the licensing picture on the destination 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

1. Establish what you have today against what the business genuinely needs
2. Design the destination — tenant choice, licensing, routing
3. Pilot with a small group and measure what really changes for users
4. Cut over in a planned window; we schedule it for a weekend
5. Hypercare — we stay on through the settling-in period, while the small faults surface
6. 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 Office 365 migration in Nantong 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.

Our experience

Our China practice dates back to 2002 and Microsoft 365 work sits at its centre. We ran a pilot migration from the global tenant to 21Vianet for a client here, and we run cloud estates day to day — one of them more than thirty Azure virtual machines alongside Microsoft 365. Siemens, Nestlé, McKinsey and JLL are among the names we work with, generally alongside the international IT firms whose client sites we support.

The questions that come up every time

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?

In a well-planned cutover, not at all in any meaningful sense: mail flow switches in a window and users sign in again afterwards. What takes time is the settling-in — profiles, devices, shared mailboxes, and the occasional Teams channel that behaves unexpectedly.

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 Nantong

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.