Any attempts to add a customer/reseller in Customer and Business manager(CBM) return the following error:
Error: Your license only allows 0 active customers or resellers and you have no more available. Please upgrade your license.
Customer and Business Manager feature is not included in Plesk license.
It is not possible to purchase a new Plesk license with Customer and Business Manager feature as it is not offered anymore. It is not available anymore neither from online store, nor from sales officer, nor resellers. Existing licenses will not be terminated and will continue to work.
We suggest you to consider Odin Business Automation Standard as an alternative solution. You can find more information on this product at our website: http://www.odin.com/products/obas/
Purchase options and pricing are available only through Odin sales channels, please request more details here: http://www.odin.com/products/obas/how-to-buy/
For further details, please contact your sales representative.