Office 365 Installation Help
Having trouble installing Microsoft Office 365 / Microsoft 365? This independent guide walks you through installation, activation, and common error fixes.
Installation Steps
Sign in to your Microsoft account
Go to office.com and sign in with the Microsoft account linked to your Office 365 subscription.
Click 'Install Office'
From the Office home page, click the 'Install Office' button and select 'Office 365 apps' from the dropdown.
Run the installer
Open the downloaded file (OfficeSetup.exe on Windows or Microsoft_365.pkg on Mac) and follow the on-screen instructions.
Activate Office
Once installed, open any Office app (Word, Excel, etc.) and sign in with your Microsoft account to activate your licence.
Install on additional devices
Microsoft 365 Personal allows installation on up to 5 devices. Repeat the process on each device using the same account.
Common Installation Errors
Uninstall any previous Office versions using the Microsoft Support and Recovery Assistant tool, then reinstall.
Check your internet connection. Temporarily disable your firewall or antivirus and try again.
Ensure you are signed in with the correct Microsoft account that holds the subscription. Check your subscription is active at account.microsoft.com.
Product keys are not used for subscription-based Office 365. Sign in with your Microsoft account instead.
Still having trouble?
Microsoft support can remotely assist with installation issues. Have your order number and device details ready before calling.
Call 1-800-msn