Office 365 Customer Service
This is an independent guide to contacting Microsoft Office 365 support. We are not affiliated with Microsoft. Use the options below to reach official support channels.
Phone Support
Microsoft support line for Office 365 billing and subscription issues.
1-800-msn
Available Mon–Fri, 9am–9pm EST
Call NowLive Chat
Chat with a Microsoft support agent directly from the Microsoft 365 admin centre.
microsoft.com/support
Available 24/7 for subscribers
Start ChatEmail / Ticket
Submit a support ticket for billing disputes, refund requests, or account issues.
Via Microsoft Support Portal
Response within 1–3 business days
Submit TicketCommunity Forum
Get help from the Microsoft community and official Microsoft agents.
answers.microsoft.com
Free, community-powered support
Visit ForumHaving billing issues?
If you have been charged unexpectedly or cannot cancel your subscription, our independent guides can help you understand your options.