How To Fix XS602 - Currently no delivery to &, as recipient is unknown

XS602 - Overview

• Message type: E = Error

• Message class: XS - SAPconnect: All messages

• Message number: 602

• Message text: Currently no delivery to &, as recipient is unknown

What causes this issue?

At this moment, the message cannot be delivered from the node to
recipient &V1&, since this recipient is unknown.

System Response

Processing was completed normally.
Additional information of the used node (if available, in the system
language of the node):
&V4&

How to fix this error?

Attempt to resend the message at a later time.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

XS602 - Details

• The SAP error message XS602, which states "Currently no delivery to &, as recipient is unknown," typically occurs in the context of SAP's messaging or communication systems, such as SAP Business Workflow or SAP Exchange Infrastructure (XI). This error indicates that the system is unable to deliver a message or notification to a specified recipient because it cannot identify or locate that recipient in the system.
  Causes:
  
  Unknown Recipient: The recipient specified in the message does not exist in the system. This could be due to a typo in the recipient's identifier (e.g., user ID, email address).
  Inactive User: The recipient may be inactive or not properly configured in the system.
  Missing Configuration: The necessary configuration for the recipient's communication method (e.g., email, workflow) may be missing or incorrect.
  Authorization Issues: The user may not have the necessary authorizations to receive messages or notifications.
  System Configuration: There may be issues with the system configuration that prevent