You're asking about "sw-dvd5-office-professional-plus-2016-w64-english" — that filename typically refers to the official DVD-style ISO/installer image for Microsoft Office Professional Plus 2016, 64-bit, English.
The string sw-dvd5-office-professional-plus-2016-w64-english refers to a specific Volume License (VL) installer for Microsoft Office Professional Plus 2016. It is commonly distributed as an ISO disk image for 64-bit Windows systems. Core Software Information Full Product Name: Microsoft Office Professional Plus 2016 sw-dvd5-office-professional-plus-2016-w64-english
Important: No legitimate Microsoft partner or reseller would distribute software under this naming scheme. If you encounter this file in a corporate environment, immediately flag it to your security team. Core Software Information Full Product Name : Microsoft
MAK (Multiple Activation Key): A single key used for a specific number of activations. sw-dvd5-office-professional-plus-2016-w64-english
KMS/MAK Activation: Enterprises usually activate this software using a Key Management Service (KMS) or a Multiple Activation Key (MAK) provided through their organization’s licensing agreement. Why Use the 64-bit (W64) Version?