The most secure way to get the "Full" version is through Microsoft’s own servers. Even if you don't have your original disc, you can often retrieve your installer if you have a valid product key:
The following applications and tools are included in MS Office 2016 64-bit full: index of ms office 2016 64 bit full
—making it essential for power users working with massive Excel workbooks or high-resolution PowerPoint animations. Microsoft Support Core Applications Included The most secure way to get the "Full"