Office 365 migration in Osaka
A Office 365 migration project in Osaka looks simple on a spreadsheet and rarely stays that way. The first question is the one nobody asks outside China: the global Microsoft tenant, or the local 21Vianet service? From there it becomes a design exercise — keeping mail flowing, Teams history intact, and an audit trail your head office can actually read.
We run the whole sequence for foreign-owned companies in Osaka: 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.
Why Office 365 migration in Osaka 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.
We audit before anyone touches a mailbox: licence entitlements, domains and DNS, mail flow rules, Teams and SharePoint usage, identity configuration, and which devices are enrolled where. Most migrations take two to four weeks from audit to cutover.
The scope we move
- 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
- 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
We move mailboxes first and collaboration content second, which keeps the team productive while the remainder follows.
How a migration runs
- Audit the current tenant and the actual business requirements
- Settle the destination design: tenant, licensing, routing
- Pilot with a small group and measure what really 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
- 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 Osaka 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.
Questions we get asked
Do we have to move to 21Vianet if we are in China?
Not necessarily. Many foreign-owned companies stay on the global tenant quite happily; what you trade is performance, routing, and the ease of evidencing how data is handled. We also see the reverse, 21Vianet back to global, when a company restructures or exits. It depends on your users, your regulator and your head office — which is exactly why we audit 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 Osaka
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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