Conversations among multiple participants for collaboration and communication in Teams
Hi Rocio,
I am an Independant Advisor and a Teams user like you.
You'll find the option to delete a post, on the post, in the menu with 3 dots that you can find next to the emojis. If you do not see the delete option, then it means that the Teams has been set to not allowing deletion by owners.
Students should be able to chat with you without you giving them any kind of permissions. More info here : https://support.microsoft.com/en-us/office/meet...
Regards,