Hi @TransitCon
The licenses are not assigned to specific meetings, but rather assigned to specific users and all the meetings hosted by that user have that increased meeting capacity. Since you need to host 4 simultaneous meetings, you will need to create 4 different users on your account, then assign each a license, and have each user schedule one of those sessions. If you've already scheduled the 4 meetings and need to keep those the same, but just need to move 3 of the 4 to another user, you can use scheduling privilege to help you transfer them.
Hope that helps and please make sure to mark the solution as accepted if this information is what you needed.