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So far, in case of a delete, the profile has been removed in Umbrella Faces as long as the external system's response has been a valid JSON (regardless of OK or FAIL).
We are planning to correct this handling, meaning to process deletions only if the external system's response is an OK.
Important: If, due to any reason, the profile for which we send a delete request has already been removed in the external system, an OK response is required as well, as otherwise the profile can't be deleted in Umbrella Faces.