Syedkhadeer, not always you can change a designation in your ID. Sometimes it's better even not to try..As you said, if the company couldn’t get let’s say "Indian Manager" visa (that was the reason why they recorded him as an Accountant, right?), what make you thinking that after he is hired, the Company will get a quota for “Indian Manager”? Moreover, when such attempt is made at the time the renewal RP, and the quota for “Indian Manager” is not approved, government might cancel this RP completely, under any designation.
And by the way it includes westerners as well, when it comes to the administrative positions (don’t forget Qatarisation). Let's say some british was hired 3 years ago as an Admin. When he tries to renew his RP, the quota for “UK Admin” is rejected, and “Qatari Admin” quota is given instead, in order to encourage the Companies to hire locals. That's it. Brit will have to go home, or to try to find another job.
One should be very careful with such thing.