Instructions for activating: Office Home & Business 2016/2019/2021 for Mac
Step 1. Go to https://setup.office.com, => Sign in with your Microsoft account
Step 2. Enter your Product KEY => Click “Next”
(If you have already activated the Product Key before, please skip step 2 and go to install Office)
Step 3. Download your app
You can install Office from this link https://account.microsoft.com/services/
Step 4. Install Office Home & Business for Mac on your computer
Step 5. After the Office installation is done => Open Word/Excel => Sign in with your Microsoft account on Word/Excel to activate the application.
Wishing you success and happiness!