The Missing Apprentices

It is a series of quests given by Phinis Gestor. Unfortunately, the quests are broken as they never begin as intended.

Background
Lost Apprentices was a series of short quests to find four missing students from The College of Winterhold. The students were Borvir, Ilas-Tei, Rundi and Yisra. Their related quests are as follows:
 * Lost Apprentices: Borvir
 * Lost Apprentices: Ilas-tei
 * Lost Apprentices: Rundi
 * Lost Apprentices: Yisra

Upon speaking to Phinis Gestor, the discussion doesn't create a quest entry in the logbook. After finding the students and their respective belongings, there's no dialogue option to inform Phinis of their fate.