X-B3-TraceId header returned as part of requests to Digital Identity Management with a unique string generated on each request as its value.
However, customers that integrate with Digital Identity Management (especially in cases where machine-to-machine interactions are required) may already be using distributed tracing internally, and so wish to use their own internally generated value with Digital Identity Management, instead of Digital Identity Management generating a trace identifier of its own. Digital Identity Management supports accepting the X-B3-TraceId header with each request, using the value provided as the trace identifier.

