Hello,
After review "Fan-out and cascade data protection deployments" https://docs.netapp.com/ontap-9/index.jsp?topic=%2Fcom.netapp.doc.pow-dap%2FGUID-2B4BA77A-8263-4686-9F5D-603D96F89878.html
I also test in simulator, both vault destination could restore to primary.
filerA vault filerB with filerA vault filerC should be support, is correct?
Best regards,
Chung