Can I ask for settlement to an EEFC account instead of INR settlement?
Ask Support to confirm the arrangement before the overseas customer sends money. The usual Indian settlement instructions should not be replaced with an EEFC account simply because it belongs to the same business. Foreign-currency settlement needs its own confirmation of eligibility, currency, destination details and charges.
Tell Support that you want foreign-currency settlement rather than leaving funds in a receiving account. Those are different requests. Use only the destination and collection instructions confirmed for your account.
If a payment is already moving toward INR settlement, ask whether a change is still possible. Do not assume it can be stopped, converted back or redirected. Ask Support for the current EEFC quote and permitted change procedure before proceeding.