Hi
1. Download Visual 2012,2015, 2017 or 2019
2. Kingsway soft download link
www.kingswaysoft.com/.../download
3. Once Setup is ready please watch below video link this will help you to setup SSIS package
4. Now, consider example to migrate Account and Leads. So, First you need to migrate all Accounts/Leads into Target CRM system
5. Once above step done then you need to Migrate Middle entity. In our case it will be AccountLeads entity.
Regarding mapping you can check below links as well
Thanks,
Pradeep.
Please mark this as VERIFIED if it helps.