Find Microsoft 365 for business support phone numbers by …
https://learn.microsoft.com/en-us/microsoft-365/admin/support-contact-info?view=o365-worldwide
WebPhone number: 8 820 0071 0003. Select "Business", then select "Microsoft 365". Billing support hours: Russian: Monday through Friday, 10 AM-7 PM Moscow. English: Monday through Friday, 9 AM-5 PM London. Technical support hours: Russian: Monday through Friday, 7 AM-8 PM Moscow. English: 24 hours a day, 7 days a week.
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