Thanks for your order of Project 2016 pro.
You should have already received your key in a previous email. If not, the first 25 digits of your tracking number is your key.
Your download link:
1. Please visit setup.office.com
(Please note office.com is Microsoft website and this is the official site to download Microsoft office software. Below is an illustration.)
2. Login or create your MS account. If you do not have Microsoft account, you can easily create one with any email address.
3. Enter key
4. Choose your country and language and click next.
5. Start to download and install.
Please use this key for only one computer or the number of computers the key is configured for you. Otherwise, the key will get blocked by Microsoft. Please use it asap.