Exchange Server 2013 CU7 email spoofing

Dear All,

I am working with Exchange 2013 with CU7, seem Exchange 2013 doesn't have ms-Exch-SMTP-Accept-Authoritative-Domain-Sender  feature

So we can't preventing spoofing my company’s email addresses

This is has fixed on CU8 ? or anyone who have a workaround ?

Thanks,

Minh