The MSI for single-installation deployment installs Slack for Windows machine-wide, either to Program Files or to a location of your choice. The MSI for per-user deployment adds the Slack installer machine-wide, rather than individually installing Slack for Windows. The table below should help you select the correct installer for Slack deployment. You need to choose the installer based on your requirements. Slack provides two distinct Microsoft Installer (MSI) packages (Slack Deployment Tool) that IT Administrators can use to install Slack for Windows for multiple users or machines. However Slack provides both executable and MSI installer but wait there is something that you need to know. Few companies provide enterprise installers such as Google Chrome, Firefox which are enterprise MSI installers. Normally when you download an application, it is available as executable.
Specify Slack Application Icon in ConfigMgr.