## OPERATION: Empty Body with "unknown" header block via an intermediary, MU="1". (Test T17)

This operation sends a string value in a header block that is unknown to the receiver. The target of the header block is the intermediary, using role "next". MustUnderstand is "1".

### Enter the SOAP service endpoint URL you wish to use:

### Enter the string value for the header block:

### Request message buffer:

### Response message buffer: