How to Install Microsoft 365 on a Second Computer
Question details
The user needs to locate their active Microsoft 365 license and install the Office suite on an additional computer.

- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Installing Office applications on a second device under an existing Microsoft 365 Personal or Family subscription.
- Observed behavior
- The user wants to know the correct procedure to download and activate the software on a new machine without purchasing a new license.
Ensure you have the email address and password for the Microsoft account that originally purchased the active Microsoft 365 Personal or Family subscription.
Install Microsoft 365 from the Services & Subscriptions Page
Use your primary Microsoft account to download and activate Office on your second computer directly from Microsoft's portal.
Microsoft 365 Personal and Family subscriptions allow you to install the Office suite on multiple devices simultaneously. You do not need a new product key; your subscription is securely tied to your Microsoft account.
On the second computer, open a web browser and go to the official Microsoft account Services & subscriptions page.
Log in using the exact Microsoft account credentials associated with your active Microsoft 365 subscription.
Locate your Microsoft 365 subscription in the list of services and click the Install button to begin downloading the Office setup file.
Run the downloaded setup file. Once the installation is complete, open any Office application like Word and sign in when prompted to fully activate the software.
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Frequently Asked Questions
Do I need to buy a new product key for my second computer?
No, if you have an active Microsoft 365 Personal or Family subscription, your license is tied directly to your Microsoft account. You simply need to log in to your account on the new computer to download and activate the software.
How many computers can I install Microsoft 365 on?
You can install Microsoft 365 on multiple devices, including PCs, Macs, tablets, and phones. However, Microsoft's policy limits you to being signed in to the Office apps on a maximum of five devices simultaneously.
What should I do if my subscription isn't showing up on the installation page?
Ensure you are signed in with the correct Microsoft account that was originally used to purchase the subscription. If you have multiple email addresses, log out and check the Services & subscriptions page using your other accounts.
Can I share my Microsoft 365 license with someone else on the second computer?
If you have a Microsoft 365 Family subscription, you can share it with up to five other people by sending them an invitation. They will use their own Microsoft accounts to install it. The Personal subscription is restricted to one user only.




