If you are creating multiple MS Teams Meeting links at the same time in Blackboard- you could run into an issue with the Meeting Links not being added to your Blackboard Course.  (After you click on “Add To Calendar”)  There is a known bug where Blackboard and Microsoft sometimes have a delay in communicating with each other.  If you are trying to create multiple MS Teams Meeting links at the same time in Blackboard- you may have to wait 15 -20 minutes in between creating each one.