If joined unknown persons how to get details

Hello Sindhuri - As I read your question, the first thing that came to my mind was. How could I make this a more straightforward process? Zoom has a feature called a waiting room. I could have the students enter; in that room, I can have both specific messaging and a video explaining to the students that they need to ensure that they have an appropriate user name when allowed into the classroom. You, as the host, can enable the attendees to "rename" themselves to reflect something relevant to your students.

Information on Waiting Rooms can be found here: https://support.zoom.us/hc/en-us/articles/115000332726-Waiting-Room#h_57118d8b-1498-4c4c-a520-f8a5815930a7.

Information on Allowing participants to rename themselves can be found here: https://support.zoom.us/hc/en-us/articles/360061811431-Allowing-participants-to-rename-themselves.