Enter the email address associated with your Microsoft 365 subscription, then enter your password.
Personal subscription → use your personal Microsoft account.
Work/school subscription → use your organization or school account.
3. Download Microsoft 365
After signing in:
Select Install apps or Install Microsoft 365.
Choose Microsoft 365 apps.
Your installer will download.
4. Install Microsoft 365
Windows
Open the downloaded installer.
Select Yes if Windows asks for permission.
Wait while Microsoft 365 installs.
When installation finishes, select Close.
Mac
Open the downloaded .pkg installer.
Follow the installation instructions.
Enter your Mac administrator password if requested.
Finish the installation.
5. Open an Office app
Open Word, Excel, or PowerPoint from your computer.
When prompted, select Sign in and use the same Microsoft account you used to download Microsoft 365.
6. Activate Microsoft 365
Follow the on-screen instructions. Once activation is complete, you can start using Word, Excel, PowerPoint, Outlook, and the other apps included with your subscription.
Tip: If you're installing Microsoft 365 on a work/school computer, your organization may use a different installation process or require administrator approval.