Arun, first you have to get knowledge from UAE EMBASSY located in DIPLOMATIC AREA. They will tell u the right procedure.
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As far i Know, you might be asked to get it attested from DUBAI CHAMBER OF COMMERCE as this company is DUBAI BASED. Then it will be attested by MOFA Dubai
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After that, you will get it attested from UAE EMBASSY and then from MOFA Qatar.
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Well this what i went throught with Qatar based company's document attestation so i'm thinking the same for u too
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Anyhow, just go to UAE embassy and take first hand knowledge from them.