Having some config trouble here… trying to bulk update agent shifts tied to our apac byoc trunks via the wfm scheduling api. endpoint is /api/v2/wfm/scheduling/agents. getting a 400 bad request with validation errors on trunk_id fields. we have 15 trunks across singapore and tokyo regions. the api accepts the json payload but rejects specific trunk references that are active and registered. checked sip credentials and outbound routing rules in genesys cloud admin console. everything looks fine there. failover logic is configured correctly for carrier redundancy. wondering if there is a known issue with the wfm api not recognizing byoc trunk metadata correctly. or maybe a timezone normalization flag needs to be set in the request body? the documentation is vague on trunk validation for scheduling endpoints. any help on debugging this validation error would be appreciated. logs show no specific carrier rejection. just generic api 400. using sdk version 2.4.1 for api calls. need this fixed before next shift changeover.
Have you tried verifying the trunk ID format against the BYOC specific identifier requirements?
The standard trunk ID often differs from the external SIP endpoint reference.
Check the platform API documentation for BYOC trunk resolution.
Have you tried checking the trunk_id format in the WFM API payload? In Zendesk, custom fields were straightforward, but Genesys Cloud BYOC trunks require the internal resourceId, not the external SIP URI. Verify the ID matches the output from /api/v2/telephony/providers/edges. The 400 error often stems from this mismatch.
Have you tried verifying that the trunk_id values in your JSON payload correspond to the internal Genesys Cloud resource identifiers rather than the external SIP URIs or administrative names? The WFM Scheduling API is strict about data types and expects the unique resourceId string found in the Telephony Providers configuration.
This discrepancy frequently causes 400 Bad Request errors when bulk updating shifts for BYOC environments, particularly across multi-region setups like Singapore and Tokyo. The validation engine rejects the payload because it cannot resolve the external identifier within the internal scheduling context. To resolve this, retrieve the correct IDs via the /api/v2/telephony/providers/edges endpoint. Ensure each trunk reference in your agent shift update matches the id field from that response. This alignment is critical for maintaining data integrity between the telephony infrastructure and the workforce management modules.