
Hello!
If you have a Microsoft 365 license, simply access your Microsoft account on your new laptop > Click Subscription > View Benefits > Install Microsoft 365 > Download the installer.
https://account.microsoft.com/account?lang=en-us
Afterward, install Microsoft 365 and sign in with your Microsoft account. Your license is linked to your account.
If you have other versions of Office, such as Office 2019, and the key isn't linked to your account, you'll need the activation key. You can find it in emails or receipts from your key purchase. See the link below: