Hi,
R80 Security Management is a platform change - completely different backend design and a different frontend technology. Many of the R7x scripts are replaced with R8x alternatives. We hope that we can clarify solutions to all our customers' product questions with this community.
For migrating between a SmartCenter and a Multi-Domain we don't have an official tool at the moment. We are working on one and then it will be published. I could offer this procedure, for some of the objects:
1. Upgrade an R7x to R8x SmartCenter using either CPUSE or Advanced Upgrade
2. Export policies and their members using the ExportImportPolicy tool (you can create an export per policy) Python tool for exporting/importing a policy package or parts of it
3. Create a new R8x Multi-Domain machine
4. Import the policies from step 2
This tool is a Community Tool, not an official Check Point project, and the community generally updates and fixes it based on requests.
This tool currently support security policies and their members, but some of the object types are not fully supported for export and import, like Gateway settings. In such a case, an appropriate dummy object will be exported instead, and a message will be logged into the log files to notify you of this. In the Check Point SmartConsole you can easily replace each of these objects by searching "export_error" in the search field, see where each object is used, create the necessary object manually, then replace it.