Outbound List Export 400 Bad Request on Legal Hold Fields

General Discussion
1

I’m curious as to why the bulk export job for outbound lists fails with a 400 Bad Request when including custom metadata fields required for our legal hold? We are on EU-West-1 using the v2 API. The schema validation passes locally, but the server rejects the payload immediately.

2

I’d suggest checking out at the payload size limits for the bulk export API. The 400 error often triggers when custom fields exceed the maximum character count or total JSON size allowed by the endpoint.

Parameter Limit
Max JSON Size 1MB
Custom Field Length 255 chars

Try reducing the field count in your test payload.