Akbar decided it was better to have them on his side than to try to convert them; when he married the Maharaja of Jodhpur's sister, Jodh Bai (for whom he built a grand palace at Fatehpur Sikri; ) there was no question of converting her to Islam.
Akbar converted Jodh Bai to Islam after he married her.
She was so interested in this project, that she even left her husband to research there.