Yes, an NRI can open a joint Demat Account by providing KYC documents of all the account holders and dropping an email to ks.nrikyc@kotak.com from their registered email address with Kotak Bank.
How can I update FATCA(Foreign Account Tax Compliance Act) in my trading and demat account?
I'm moving abroad, can I continue to use my Kotak Securities Neo trading account?
How can an NRI account place order?
How can NRIs buy the REs, since they cannot pay through RTA?