BYOC Private DNS Resolution Failing for Architect API

Context: Migrating digital channels from Zendesk to Genesys Cloud within a BYOC VPC. The Zendesk API calls were straightforward, but GC’s private hosted zone seems to be blocking resolution for the Architect endpoints.

Question: Could someone explain why DNS lookups for api.mypurecloud.com are timing out from within the VPC despite the Route 53 private zone being configured? The logs show a timeout error on the POST request to /api/v2/architect/flows.

Check your Route 53 resolver endpoints in the public subnets.

1. Ensure the private hosted zone is associated with the correct VPC.
2. Verify the security groups allow UDP/53 traffic to the resolver endpoints.