How To Fix TN805 - No valid maintenance certificate found (see long text)

TN805 - Overview

• Message type: E = Error

• Message class: TN - Support Package Manager (SPAM) Messages

• Message number: 805

• Message text: No valid maintenance certificate found (see long text)

What causes this issue?

No valid maintenance certificate found for system &V1&.
System ID:,,<ZH>&V1&</>
System Number:,,<ZH>&V2&</>
Installation Number:,,<ZH>&V3&</>
Certificate Name:,,<ZH>&V4&</>

How to fix this error?

As of 2009, maintenance certificates are required to be able to install
and maintain SAP Software using the tools Add-On Installation Tool and
Support Package Manager. These maintenance certificates can be requested
using SAP Solution Manager and distributed automatically to the systems
to be maintained.
For more information, see the SAP Support Portal under
http://service.sap.com/maintenancecertificate and SAP Note 1240265.
Component SV-SMG-LIC is also available for any further queries or
problems.

Error message extract from SAP system. Copyright SAP SE.

TN805 - Details

• The SAP error message TN805 "No valid maintenance certificate found" typically occurs in the context of SAP's transport management system (TMS) when there is an issue with the maintenance certificate for a transport directory or transport request. This error indicates that the system cannot find a valid maintenance certificate for the transport directory, which is necessary for the transport process to proceed.
  Causes:
  
  Missing or Expired Maintenance Certificate: The maintenance certificate for the transport directory may be missing or has expired.
  Incorrect Configuration: The transport directory may not be correctly configured in the system.
  Transport Directory Issues: There may be issues with the transport directory itself, such as file system permissions or corruption.
  System Landscape Changes: Changes in the system landscape, such as system copies or migrations, may lead to invalid certificates.
  
  Solutions:
  
  
  Check Maintenance Certificate:
  
  Verify if the maintenance certificate is present and valid. You can check this in the TMS configuration.
  If the certificate is missing or