How To Fix XMS_ADM640 - Error during user switch (principal propagation procedure). &1&2&3&4

XMS_ADM640 - Overview

• Message type: E = Error

• Message class: XMS_ADM - XMS - Administration

• Message number: 640

• Message text: Error during user switch (principal propagation procedure). &1&2&3&4

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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XMS_ADM640 - Details

• The SAP error message XMS_ADM640 indicates that there was an error during a user switch, specifically in the context of principal propagation. This typically occurs in scenarios where a user is trying to access resources or perform actions that require a switch to a different user context, often in environments that utilize Single Sign-On (SSO) or when integrating with external systems.
  Causes:
  
  
  Configuration Issues: The principal propagation settings may not be correctly configured in the SAP system or in the external system (like an application server or a web server).
  Authorization Problems: The user may not have the necessary authorizations to perform the user switch.
  Network Issues: There could be network connectivity problems between the SAP system and the external system.
  Missing or Incorrect User Mapping: The mapping between the users in the SAP system and the external system may be incorrect or missing.
  Technical Errors: There may be underlying technical issues, such as problems with