## 5.4.5  Create Formations to Define the Event Sharing Context
When SAP Cloud Application Event Hub distributes events between SAP Subscription Billing and SAP S/ 4HANA Cloud Public Edition, the data is handled in a secure manner. A formation enforces customer tenant data segregation, or the sharing context, for these applications when they are registered as SAP systems.
For easier reading, "SAP S/4HANA Cloud" is used in this help section to refer to the software product SAP S/4HANA Cloud Public Edition.
## Prerequisites
- You have Global Account Administrator or System Landscape Administrator authorizations.
- You have subscribed to the SAP Cloud Application Event Hub application (see Subscribe to the SAP Cloud Application Event Hub Application [page 65]).
- You have registered your SAP S/4HANA Cloud system in your global account (see Register Your SAP S/4HANA Cloud Public Edition Tenants in Your Global Account [page 14]).
## Procedure
##  Note
The subaccount where SAP Cloud Application Event Hub is subscribed can only be part of one formation in a global account.
SAP systems can only be added to one formation of type Eventing Between SAP Cloud Systems in a global account.
|   Step | Task                                                                                                                                    |
|--------|-----------------------------------------------------------------------------------------------------------------------------------------|
|      1 | In your global account, navigate to System Landscape .                                                                                  |
|      2 | On the Formations tab, choose Create Formation .                                                                                        |
|      3 | Follow the guided steps to enter all the required information for your formation: 1. Add a name that helps you identify your formation. |
## Next Steps
You now need to configure communication in your SAP S/4HANA Cloud system. You can find a description of how to do this in the setup instructions for scope item 57Z (Subscription Management with Sales Billing) or 5IK (Subscription Management with Convergent Invoicing).
In your SAP S/4HANA Cloud system, you create communication arrangements based on the following communication scenarios:
- SAP\_COM\_0892 (SAP Cloud Application Event Hub Integration)
- SAP\_COM\_0884 (SAP Subscription Billing - Event Consumption Integration)
Once you've done that configuration, continue in the current guide with the activity Enable Event Subscriptions [page 69].
## Removing a System from the Formation
After you have created a formation, you can edit it and change the included systems. If you want to remove an SAP system from a formation of type Eventing Between SAP Cloud Systems , make sure that all active event subscriptions are disabled first in SAP Cloud Application Event Hub. You can check your subscriptions in the SAP Cloud Application Event Hub application on the Subscriptions page.
## Deleting Formations
When you delete a formation, the systems are excluded from the formation, the subaccount is unassigned, and finally, the formation is deleted from the formations list completely.