## 5. Create a communication system.
Create a communication system using the Communication Systems app in your ABAP environment system. Enter the following data:
## General Data
| Field                       | Input                                                                                                                                                                   |
|-----------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| System ID                   | Provide a system ID, for example, MY_COMMUNICATION_PARTNER .                                                                                                            |
| SystemName                  | Provide a system name.                                                                                                                                                  |
| Technical Data              |                                                                                                                                                                         |
| Field                       | Input                                                                                                                                                                   |
| General - Inbound Only      | Yes                                                                                                                                                                     |
| Identity Provider           |                                                                                                                                                                         |
| Field                       | Input                                                                                                                                                                   |
| OAuth 2.0 Identity Provider | On                                                                                                                                                                      |
| User ID Mapping Mode        | Select User Name . Thereby, if the NameIdFormat is unspecified, then the value of the NameID element in the SAML assertions' sub- ject will be mapped to the user name. |
| SAML Bearer Issuer          | Enter the SAML entity ID of the SAML bearer issuer, which corresponds to the common name (the string after CN=) of the signing certificate subject.                     |
Field
| Signing Certificate             | Upload the signing certificate.                                                                   |
|---------------------------------|---------------------------------------------------------------------------------------------------|
| Users for Inbound Communication |                                                                                                   |
| Authentication Method           | User Name/Client ID                                                                               |
| OAuth 2.0                       | Add a user. User name of the communication user (= OAuth client ID), for example, MY_OAUTH_CLIENT |