Is it permissible for a woman observing iddah to attend university in modest clothing and without speaking to men, especially since the university does not grant leave and the divorce occurred after her husband deserted her for five years?

It is permissible for a divorced woman to leave her home to attend university during her iddah (waiting period), provided that the university does not grant leave and that her absence would affect her academic performance, with the obligation to spend the night at home and avoid mixing with unrelated men. The iddah of a non-pregnant divorced woman is three menstrual cycles, or three months if she does not menstruate, while for a pregnant woman, her iddah ends upon delivery.