Hello Cindy Robinson,
Thank you for reaching out in Microsoft Q&A forum.
I understand you want to download and activate Office Professional Plus 2021 with your key without installing Microsoft 365.
To do that, you can follow these steps:
- Go to the official Microsoft download page for Office 2021: https://setup.office.com/
- Sign in with your Microsoft account.
- Enter your Office Professional Plus 2021 product key.
- Choose Office 2021 (not Microsoft 365) and download the installer.
- Install and activate using your key.
For more details, please follow instructions in this link: Download and install or reinstall Office 2021, Office 2019, or Office 2016
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