Oracle Integration Cloud (OIC) provides different adapters to connect and interact with various systems, databases, and services. The SOAP Adapter is one of these and is used to interact with web services that follow the SOAP (Simple Object Access Protocol) protocol.

Here are some key points to remember when working with the SOAP Adapter in OIC:

1. WSDL: The SOAP Adapter requires the WSDL (Web Services Description Language) file of the SOAP web service. This file contains the necessary information about the service, like what operations it supports, what data structures it uses, etc.

2. Operations: The SOAP Adapter can perform different operations like Invoke (to call a service), Callback (to accept a callback from a service), or Listen (to listen for requests from a service).

3. Configuration: You need to configure the SOAP Adapter with details like the endpoint URL of the web service, the operations to perform, security parameters, etc. OIC provides a user-friendly interface for this.

4. Mapping: You can map the inputs/outputs of the SOAP service to other components in your OIC integration flow. This allows you to transform data, handle exceptions, etc.

5. Monitoring and Troubleshooting: OIC provides tools for monitoring the performance of your integrations and troubleshooting any issues.

Remember that SOAP is a protocol for exchanging structured information in web services using XML, and the SOAP Adapter allows OIC to interact with these services. However, many modern web services use the REST protocol, which is generally simpler and more flexible. OIC also provides a REST Adapter for interacting with RESTful services.