Catch you are missing the point.

He had no RP, so no need for an NOC.

Exit permit doesnt matter, and if he was here on a visit visa it is also not needed. He must have been here on a business visa.

He needs to clear this with his employer. Something is not right with this situation. If he had no RP he doesnt need an NOC. If his previous employer issued an exit permit he either had to have had an RP or was here on business visa. If he was here on business visa, there is also no need for an NOC as it is not allowed to work here on either a visit or business visa.

"Diplomacy is the art of saying 'Nice doggie' until you can find a rock - Will Rogers"