Agent Scripting Data Action fails with 403 on S3 Upload for Legal Hold

Can anyone clarify the authentication requirements for custom Data Actions when exporting agent scripting metadata for legal discovery? The environment is Europe/London, Genesys Cloud v2024.2.0. The goal is to export specific agent script versions and associated usage logs to an S3 bucket for chain of custody verification. The bulk export job initiates successfully via POST /api/v2/analytics/bulk-export/jobs, but the subsequent Data Action step fails consistently.

The error returned is HTTP 403 Forbidden. The response body indicates:

{
 "code": "forbidden_exception",
 "message": "Insufficient permissions to access S3 bucket: legal-hold-archive-eu-west-2"
}

The IAM role attached to the Genesys Cloud integration has s3:PutObject and s3:ListBucket permissions. The bucket policy allows access from the specific Genesys Cloud IP range for Europe/London. The Data Action configuration uses the standard S3 upload template. The issue persists even after rotating the IAM keys and verifying the bucket ARN. The script metadata includes sensitive legal hold tags, so data integrity and audit trail preservation are critical.

The documentation states:

“Ensure the IAM role associated with the integration has explicit permissions to write to the target S3 bucket. Cross-region requests may require additional VPC endpoint configurations or specific bucket policies allowing access from the Genesys Cloud service principals.”

The bucket is in eu-west-2, and the Genesys Cloud instance is in Europe/London. No VPC endpoints are configured, as the integration uses public internet access. The failure occurs specifically when the Data Action attempts to write the JSON payload containing the script versions. Standard recording exports to the same bucket succeed without issue. The difference is the data structure size and the inclusion of XML-based script definitions.

Is there a known limitation with Data Actions handling large XML payloads for legal hold exports? Or is there a specific header required in the Data Action configuration for S3 uploads in this region? The audit trail shows the job status as failed with no retry mechanism triggered. Need to resolve this urgently as the legal discovery deadline is approaching. Any insights on permission scopes or payload size limits for this specific use case would be appreciated.