If you've purchased Creative Cloud for teams through Adobe.com, you can purchase additional licenses at any time and will be billed in your next billing cycle. Similarly, if you purchase licenses through a reseller, you can add licenses at any time. However, you will need to place an order with your reseller within 30 days to complete the transaction. If you do not place your purchase order within 30 days, you will not be able to add any more licenses and your unpaid licenses may be deactivated. All additional licenses will co-terminate with your original anniversary date.
If you do not know who your VIP reseller is, please contact customer service.