> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognite.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SAP Instances

> Manage SAP instance connections in Cognite Data Fusion (CDF).

SAP instances represent connections to SAP systems that CDF can write data back to. Each instance stores the configuration needed to connect to an SAP backend. You register SAP instances to enable writeback workflows from CDF to your SAP environment.

## Overview

SAP instances act as the bridge between CDF and your SAP systems. By registering an instance, you provide CDF with the connection details and credentials required to communicate with your SAP backend.

## Configuration

Each SAP instance stores:

* **Connection details** – Host, port, and protocol settings for the SAP system
* **Authentication** – Credentials or certificate information for secure access
* **System identifier** – SAP system ID (SID) or similar identifier

<Note title="Security">
  Instance credentials are stored securely in CDF. Ensure you follow your organization's security policies when registering SAP instances.
</Note>

## Managing instances

You can create, retrieve, update, and delete SAP instances through the API. Before creating writeback requests, you must have at least one correctly configured instance registered in your project.

## Next steps

After registering an SAP instance, you typically configure [SAP endpoints](/api-reference/concepts/20230101/sap-endpoints) to define which SAP function modules or BAPIs to target, and [schema mappings](/api-reference/concepts/20230101/sap-schema-mappings) to map CDF data to SAP structures.