The script is available for download in Microsoft Script Browser for Windows PowerShell ISE. You need to install the Script Browser application first, and search for the script sample title.
This script is used to help user managing DG in cloud side.
After Hybrid is set up, the user mailbox, who was moved to cloud side, can't manage the DG created in On-Premise Exchange. This script will create a DG with prefix "EXO". All option can be changed with this DG, and this script can reflect the configuration changes back to on premise DG.
You can find more All-In-One Script Framework script samples at https://aka.ms/onescriptingallery