On Windows systems

In addition to the Endpoint Manager server, which is being configured on the isolated network, you need a computer that has access to the public Internet to download Fixlet site content using the BESAirgapTool.exe utility, and to download files referenced in Fixlet action scripts. Both the downloaded site content and the files are transferred to the Endpoint Manager server on the isolated network. This computer cannot be an Endpoint Manager server or an Endpoint Manager relay.