# Technical FAQ—Amazon S3
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 **Q: Where can I get the Amazon Simple Storage Service (Amazon S3) REST API documentation?**

For more information, refer to the [Amazon S3 REST API Introduction](https://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html). 

 **Q: How do I get the Amazon Web Services AWS Key Management Service (AWS KMS) key details to authenticate to access the Amazon S3 bucket?**

AWS Partner Network (APN) shares a policy that includes the key name. 

 **Q: How do I authenticate Amazon S3 from Salesforce.com (SFDC)?**

Use the sample code file [S3\$1Authentication.cls](https://github.com/aws-samples/partner-crm-integration-samples/blob/main/code-snippets/S3_Authentication.cls) to authenticate the Amazon S3 from SFDC. 

 **Q: How do I upload the file from the AWS software development kit (SDK) to S3?**

Use the following AWS CLI command to upload the file to S3. 

```
aws s3 cp example.json s3://awsexamplebucket/opportunity- inbound/filename.json --acl bucket-owner-full-control
```

 The sample code file [Sample\$1AceOutboundBatch.cls](https://github.com/aws-samples/partner-crm-integration-samples/blob/main/code-snippets/Sample_AceOutboundBatch.cls) contains code to upload the data file from SFDC. 

 **Q: Who owns the Amazon S3 bucket?**

AWS owns and manages the Amazon S3 bucket. You have programmatic access to your own Amazon S3 bucket with the AWS Identity and Access Management (IAM) user. 

 **Q: Are there separate folders or buckets for receiving and sending files?**

There is one bucket with different folders for receiving and sending the files. Refer to the user guide for further details on the folders. 

 **Q: Do I need to access the Amazon S3 bucket using AWS Lambda, or can I access it directly using the customer relationship management (CRM) system?**

You can access it both ways. 

 **Q: Is the Amazon S3 bucket secured or encrypted?**

Yes. We enable the default encryption mechanism that Amazon S3 offers. 

 **Q: Is it possible to enable Amazon Simple Notification Service (Amazon SNS) listening to the Amazon S3 bucket, so I can only act on the event, instead of polling periodically?**

No. Currently, APN Customer Engagement (ACE) doesn’t support this feature. 

 **Q: What folders do I have access to and what is the purpose of each folder?**

You can find the list of Amazon S3 folders in [Integration prerequisites](crm-integration-setting-up.md).