Scheduled Teams Meetings via Canvas Calendar keep Disappearing

[arary]

Hello, I'm a teacher using Canvas and Microsoft Teams to teach online. Last week I scheduled a class meeting in Teams via the Canvas calendar for every day this month. This morning all the links on B days were missing from the Canvas calendar. I created the links again. Around noon they disappeared and I had to create them again. Today was an A day and the link worked fine all day, but sometime in the afternoon the A day link for today disappeared from the calendar. Today's link was set up from 8am to 3pm, and students could click on it anytime. About 5 minutes before each class I went into the Teams app and admitted all the people waiting in the lobby. I think what's happening on Canvas is somehow students are able to delete the meetings from their calendar, which takes it off EVERYONE'S calendar. 

How can I make sure students can click on the calendar link but not edit or delete it? 

[dm200400600]

I've put that I have this same question, but actually it is only partially related but as I haven't been able to find the answer in the forums or existing guides, can any one advise on the points below?

> The Teams link can be added to Course navigation (to the left) but both Teachers and Students have access to this, it doesn't seem possible to hide it from students.

> As with the post above, when meetings are created students are able to edit and even delete meetings Teachers have created. Although you have control over elements within the Meeting there doesn't seem to be a way of a creator stopping others (apart from Admins) messing with their meeting(s) in Canvas? 

I should add I've yet to turn on sync, at the moment it is just using Teams via the Course Navigation to create ad-hoc meetings.