You will be left with a file named “SW_DVD5_Office_Professional_Plus_2016_W32_English…” (W32 here in the filename refers to the 32-bit version if you download the 64-bit version, the filename will contain 64Bit instead). Once your download is complete, you need to extract the original ISO image from the zip file. You can get the latest version of Microsoft Office here if you do not have it.
Using prewritten batch script Download original Office 2016 ISO