There are many objects within CRM that, once created, can not be deleted.
Presumably this is to enforce data integrity, but even records that have no
dependencies can't be deleted. You could try deleting directly from the DB.
MS won't endorse this, but it can be done.
It's really strange that I can only crerate a TEAM in
Business Unit and add/remove member to it, but I cannot
remove the TEAM itself. My role is System Admin
Does anyone meet the same problem?