Installation instruction: –
1) Uninstall any existing ms office package and then restart your system.
2) Then copy/paste following link in browser to  download the setup file
https://officecdn.microsoft.com/db/492350F6-3A01-4F97-B9C0-C7C6DDF67D60/media/en-US/ProPlus2019Retail.img
3) Install downloaded office software.
4) Open any app like Word or excel.
5) Enter the product key and activate.

Terms & Conditions

1. You need to activate the key within 5 days of your purchase.

2. After 5 days if there is any problem regarding the activation of the key, You may need to activate the key Telephonically.

3. This key has lifetime activation validity on same motherboard, After formatting the windows you may need to activate the key Telephonically.