You cannot share your licensed copy. Each user needs their own license. However, you can share an ISO backup with a colleague if they also possess a valid, unused product key for the same version.
Assuming you own a valid product key and have a backup ISO file stored on Google Drive (either your own or a shared link from a trusted source like a university IT department), follow these steps: Office 2013 64 Bit Download Google Drive
Many users searching for don’t fully understand why they need the 64-bit version. Here’s the breakdown: You cannot share your licensed copy