Will Indiam embassy attest POA if I have it already notarized and signed?

If witnesses cannot come to the embassy, then we need to get the Power of Attorney notarized at notary public along with witness signatures before going to embassy. Is my understanding correct ? Will the embassy attest the POA if I have it already notarized and signed ? Please let me know.

Yes, your understanding is correct. The information mentioned in above article is based on real life experience.