Explanation/Reference:
Explanation:
We copy the configuration from an existing Edge Transport server with the ExportEdgeConfig.ps1 script and apply to new server Edge3 with ImportEdgeConfig.ps1 script.
Note: Configure Edge Transport server using cloned configuration
You can use the provided Exchange Management Shell scripts (located in %ExchangeInstallPath%Scripts) to duplicate the configuration of an Edge Transport server. This process is referred to as cloned configuration. Cloned configuration is the practice of deploying new Edge Transport servers based on configuration information from a previously configured source server. The configuration information from the previously configured source server is copied and exported to an XML file, which is then imported to the target server.
Two Shell scripts are used to perform cloned configuration tasks:
ExportEdgeConfig.ps1 Exports all user-configured settings and data from an Edge Transport server

and stores that data in an XML file.
ImportEdgeConfig.ps1 During the validate configuration step, the ImportEdgeConfig.ps1 script checks

the exported XML file to see whether the server-specific export settings are valid for the target server.
References: