Install Office 2024, 2021 and 2019: redeem the key and download

This guide applies to Office versions that you link to a Microsoft account, for example
Office Home 2024, Office Home & Business 2021 or Office 2019 for Mac. You need the 25-character product key from your order and an internet connection.

1. Redeem the key

1. Open microsoft365.com/setup (equivalent: office.com/setup).
2. Sign in with your Microsoft account or create a new one.
3. Enter the product key without hyphens when prompted.
4. Follow the prompts until redemption is complete.

Redeeming links the license to your Microsoft account. This is needed only once per product key. Remember which account you used: for a later reinstallation, sign in again with exactly this account.

2. Download and install Office

1. Sign in with the same account at account.microsoft.com (Services & subscriptions) and choose Install.
2. Run the downloaded file: in Edge choose Run, in Chrome Setup, in Firefox Save File and then open it.
3. Confirm the User Account Control prompt with Yes. The installation runs automatically.

On a Mac, download the installation package from the account as well and open it in the Downloads folder.

3. Activate

Open an Office app, for example Word, and accept the license agreement. Office is now activated. If you are asked to sign in, use the account from step 1.

Frequently asked questions

The key is shown as already used. It has probably already been redeemed with an account. Sign in with that account; Office is ready to install there.

I don’t have a Microsoft account. You can create one for free while redeeming. This Office version cannot be installed without an account.

The installation does not continue? Our support helps by email or via
TeamViewer QuickSupport by appointment.

Which Office version is right for me? All versions and editions are listed under
Microsoft Office.

Sources

Checked on 2026-11-09 against the publisher’s information:

• support.microsoft.com/en-us/microsoft-365-activation-licensing/office-install/where-to-enter-your-office-product-key
• support.microsoft.com/en-us/office/download-and-install-or-reinstall-microsoft-365-or-office-2024-on-a-pc-or-mac-4414eaaf-0478-48be-9c42-23adc4716658
• support.microsoft.com/en-us/office/lifecycle/officeinstall/download-and-install-or-reinstall-office-2021-office-2019-or-office-2016