---
schema_version: "1"
id: 8ff909683eb46c91e8a266409436fcdb24b0ed85e4ea6f9d63968da5b1409768
title: Identify One Call Using CreateOptions and ConversationID
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/marketing-cloud/guides/mc-apis/async_guide_one_call.md
canonical_url: https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/async_guide_one_call.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 777ee2b03b5ee9cb4b0ae612ac2d7a1d835777f538b82c9386711ea2bc080e15
products:
  - Marketing Cloud Engagement APIs and Programmatic Languages
  - Marketing Cloud
---
# Identify One Call Using CreateOptions and ConversationID

A request can have an external unique identifier, typically the ConversationID. If you don't specify a ConversationID, include the RequestID. Using this approach provides these added benefits:

- Results are available for calls using external identifiers
- Data is protected from replayed API calls

## C# Example

<!-- Moved Gist inline (mc-doc/8f7a43897caedc4c41a77f78d75e1951) -->

```cs
CreateOptions co = new CreateOptions();
co.RequestType = RequestType.Asynchronous;
co.RequestTypeSpecified = true;
co.ConversationID = "123456"; // or any other unique string
CreateResult[] results = integrationFramework.Create(co, new APIObject[] { ts }, out requestID, out status);
```

## SOAP Envelope

<!-- Moved Gist inline (mc-doc/79db4fdb97e998942801915ea3a8e739) -->

```xml
<soap:Body>
    <CreateRequest xmlns="http://exacttarget.com/wsdl/partnerAPI">
        <Options>
            <RequestType>Asynchronous</RequestType>
            <ConversationID>123456</ConversationID>
        </Options>
...
```