The Centralized Transaction Store (CTS) is a group of adapters for SAP that belong logically together, that share a single Centralized Transaction Store. The CTS is used to store all the processed transactions in a central repository, so that the transaction status information will always be synchronized and valid. The CTS allows reliable tRFC/IDoc load balancing. There can always be just one CTS per adapter group, not two or more. All adapters of SAP that are configured to share a specific CTS are considered to be in the same group. You must configure the Remote Server with alias "SAPGroupStore" for each Adapter for SAP of your adapter group (and in exactly the same way). For more information, see Considerations about Adapter for SAP Centralized Transaction Store or Shared Transaction Store and Centralized Transaction Store.