How To Fix ICF_SYSTEM_LOGIN406 - Protocol cannot be switched to HTTPS; HTTPS is not configured/active

SAP Error Message - Details

• Message type: E = Error

• Message class: ICF_SYSTEM_LOGIN - Messages for System Logon

• Message number: 406

• Message text: Protocol cannot be switched to HTTPS; HTTPS is not configured/active

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ICF_SYSTEM_LOGIN406 - Protocol cannot be switched to HTTPS; HTTPS is not configured/active ?

  The SAP error message ICF_SYSTEM_LOGIN406 indicates that the system is unable to switch the communication protocol to HTTPS because HTTPS is not configured or active in the SAP system. This typically occurs when a user attempts to access a service that requires a secure connection, but the necessary HTTPS settings are not in place.
  Cause:
  
  HTTPS Not Configured: The HTTPS protocol is not set up in the SAP system. This could be due to missing SSL certificates or incorrect configuration settings.
  ICF Service Not Active: The Internet Communication Framework (ICF) service that requires HTTPS is not activated.
  Network Issues: There may be network-related issues preventing the establishment of an HTTPS connection.
  Missing SSL Certificates: The required SSL certificates for establishing a secure connection may not be installed or configured correctly.
  
  Solution:
  To resolve the ICF_SYSTEM_LOGIN406 error, follow these steps:
  
  
  Check ICF Services:
  
  Go to transaction SICF in the SAP GUI.
  Check if the relevant ICF service is active. If not, activate it.
  
  
  
  Configure HTTPS:
  
  Ensure that HTTPS is configured in your SAP system. This involves:
  
  Setting up the SSL server and client PSE (Personal Security Environment).
  Installing the necessary SSL certificates.
  
  
  You can configure HTTPS using transaction STRUST:
  
  Go to STRUST and check the SSL server PSE.
  If it is not configured, create or import the necessary certificates.
  
  
  
  
  
  Check Profile Parameters:
  
  Ensure that the profile parameters for HTTPS are set correctly. You can check the parameters icm/HTTPS/enable and icm/HTTPS/port.
  Use transaction RZ10 to view and modify the instance profile.
  
  
  
  Restart ICM:
  
  After making changes, restart the Internet Communication Manager (ICM) to apply the new settings. This can be done using transaction SMICM.
  
  
  
  Network Configuration:
  
  Ensure that there are no firewall or network issues preventing HTTPS traffic. Check that the necessary ports (usually 443 for HTTPS) are open.
  
  
  
  Test the Configuration:
  
  After making the necessary changes, test the HTTPS connection to ensure that it is working correctly.
  
  
  
  Related Information:
  
  Documentation: Refer to the SAP Help Portal for detailed documentation on configuring HTTPS and ICF services.
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or fixes related to HTTPS configuration.
  Security Best Practices: Ensure that you follow best practices for SSL/TLS configuration to maintain the security of your SAP system.
  
  By following these steps, you should be able to resolve the ICF_SYSTEM_LOGIN406 error and successfully configure HTTPS in your SAP system.