Configuring the Amazon S3 endpoint
To use outbound files integration with Amazon S3, you must set the AWS S3 endpoint to one that matches the region of the S3 bucket you are using.
To set the endpoint, edit the value of the AWS_S3_ENDPOINT runtime property in the configuration group.
For example:
AWS_S3_ENDPOINT="s3.eu-central-1.amazonaws.com"For
information about runtime properties, see Runtime properties.