When you delete a group, all members lose whatever access permissions were associated with that group. For example, if Group A has access to three applications and you delete Group A, Group A's members will no longer be able to open those applications.
To delete a group:
Select the user dropdown on the Global bar, then select My preferences.
In the Groups I'm In box, select the name of the group you want to delete.
On the upper left of the page, select Delete this Group.
To delete a group (as a Billing Account Administrator):
Select the Groups tab.
Select the name of the group that you want to remove.
Within the Group Properties page that opens, select Delete this Group.
A confirmation dialog box appears asking you to confirm that you want to delete the group.
Note: You can only delete groups that you manage unless you are the account admin.
Select OK.