Microsoft 365

• Install Microsoft 365

• Sign in to Microsoft 365

• Manage payment and billing

Microsoft account & storage

• How to sign in to your Microsoft account

• Change your Microsoft account password

• How does Microsoft storage work?

Activation

• Activate Office

• Activate Windows

• Find your Windows product key

Windows & devices

• Windows 11 system requirements

• Windows 10 end of support

• Find your hardware warranty

Your AI-first productivity app for work and home

Ask, create, and draft with Copilot, plus your favorite apps and content in one place.

Discover what you can do with Microsoft 365 Copilot app

If you're a small business owner

Find the information you need to build, run, and grow your small business with Microsoft 365.

Visit Small business help and learning

Contact Support

• Contact us

• Ask the community

Enterprise support

• Support for business

• IT Pros and admins

Privacy & Security

• Security

• Report a privacy concern

More support

• Accessibility

• Report a support scam