WFM Bulk Import 422 Error with Terraform Provider v1.12.0 in ap-southeast-1

Genesys Cloud WFM
1

I’m trying to figure out why the WFM bulk import fails with a 422 Unprocessable Entity when mapping Zendesk agent groups to Genesys Cloud business units.

  1. Defined schedule resources using Terraform Provider v1.12.0.
  2. Executed apply in ap-southeast-1.
  3. Received validation error on start_time format despite using ISO 8601.

The Zendesk CSV export handled this gracefully, but the GC API rejects the payload. Is there a specific timezone offset requirement for the EU-based migration context?