Does anyone know why a bulk export job triggered via an Architect flow would consistently fail with a 403 Forbidden error when targeting a BYOC S3 bucket? The flow is designed to handle legal discovery requests for digital channel transcripts. We are using Genesys Cloud version 2024-02 in the eu-west-2 region. The IAM role attached to the BYOC trunk has full s3:PutObject permissions, and manual uploads from the same role work without issue. However, when the bulk export job attempts to write the metadata and audio files, the job status shifts to failed immediately.
The error log in the Architect flow shows a generic 403 response from the S3 endpoint. I have verified that the bucket policy allows access from the Genesys Cloud service principal. The issue seems specific to the bulk export API integration rather than the trunk connectivity, as SIP recordings export correctly. Is there a specific permission or configuration required for the bulk export service to write to a BYOC bucket? I need to ensure chain of custody is maintained for these legal holds, so any insight into the permission mapping would be appreciated.
This is actually a known issue…
The 403 Forbidden error in this context rarely stems from the IAM role itself, especially when manual uploads succeed. It is almost always a mismatch in the assumed role’s trust policy or the specific S3 bucket policy conditions. Genesys Cloud’s BYOC integration assumes the role via sts:AssumeRole, but the request originates from the Genesys service principal. Ensure the bucket policy explicitly allows arn:aws:sts::*:assumed-role/<your-role-name> or uses the correct aws:SourceVpc condition if applicable.
Furthermore, check the Architect Data Action configuration. If you are using a custom S3 integration, verify the KMS key grants. The Genesys service account needs kms:Decrypt and kms:GenerateDataKey permissions on the customer-managed key, not just the IAM user permissions. A common oversight is granting permissions to the IAM role but forgetting the service-linked role required for the data pipeline. Review the CloudTrail logs for the exact principal attempting the action; it will likely reveal a service-linked role lacking the necessary s3:PutObject or s3:GetBucketLocation permissions.
Have you tried adding a Condition block to your Bucket Policy?
"Condition": {
"StringEquals": {
"aws:SourceVpc": "vpc-1234567890abcdef",
"aws:SourceVpce": "vpce-1234567890abcdef"
}
}
The manual uploads likely work because they might be hitting a different path or using a direct credential set that bypasses the VPC endpoint checks. Genesys Cloud BYOC integrations, especially in eu-west-2, often enforce strict VPC endpoint conditions for security. If the bucket policy requires aws:SourceVpce but the Genesys service principal is routing through a different interface endpoint, you get a 403.
Check your VPC configuration in the Genesys admin console. Ensure the interface endpoint ID matches the one in the S3 bucket policy. Also, verify that the IAM role has s3:ListBucket permissions, not just PutObject. Bulk exports often list objects before writing, and missing that permission can cause intermittent 403s during the job initialization phase.