Response message contains an error 401 unauthorized in pi

Hi Experts,

I am getting below error in PI (single stack7.5)

SOAP: Response message contains an errorXIAdapter/PARSING/ADAPTER.SOAP_EXCEPTION - soap fault: Server was unable to process request. ---> The request failed with HTTP status 401: Unauthorized.

The flow is Proxy to Soap:

Data is coming from SAP but failed in PI

Can you please tell me the possible options?

Regards,

Ashok S