Active: أَكْرَمَ الْمُدِيرُ الطَّالِبَ — The director honored the student.
Passive: أُكْرِمَ الطَّالِبُ — The student was honored.
أُكْرِمَ: Form IV past passive, built on fatḥa.
الطَّالِبُ: nominative passive subject.
The accusative object «الطَّالِبَ» has become nominative «الطَّالِبُ».