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.

Enter a description of your issue, confirm your contact number and email address, select your preferred contact method, and then select Contact me.

If the results don't help, at the bottom, select Contact Support.If you get a drop-down list, select the one closest to your question, or continue typing your question, then press Enter. Type a question or keyword into the text box.On the bottom right side of the page, select Help & support.For more information, see Who has admin permissions in my business?. If you get a message that says you don't have permission to access this page or perform this action, you aren't an admin. If you bought all your subscriptions through a partner, contact your partner for support. You must have bought at least one subscription through Microsoft to access Microsoft support.

Lorex client 13 support docs