
With every subscription of Office 365 operated by 21Vianet, 21Vianet support provides technical, pre-sales, billing and subscription support. Technical support is provided in English 24 hours a day, 7 days a week, and in some cases, in local languages as noted. Local language support varies by country or region.


In most countries or regions, billing support for Microsoft 365 for business products and services is provided in English from 9 AM-5 PM, Monday through Friday. The expected wait time is indicated in the Contact support pane.

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