If you have purchased either office 365 or Office 2019 retail card, the key must be at the backside of the card.
- Go to the browser and type office.com/setup uk in the address bar
- Peel the sticker from the backside of the Office retail card and get the 25-digit alpha-numeric Product key.
- Enter the 25-digit product key
- Sign in with Microsoft account or create an account if you don’t have one.
- Select the appropriate country and language
- Click on continue
- Now Download the setup file and double click on the setup file to start the installation.
Microsoft Office 365 and Microsoft Office 2019 Editions
The below-given Flowchart explains the editions of the office version. The feature and tools vary from version to version. Though both version office 2019 & office 365 has similar feature to know more details about features visit Setup.office.com