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Could not Establish Trust Relationship for the SSL TLS Secure Channel Error 9150 During License Activation

Article # 3033116 - Page views: 78

Article # 3033116 - Page views: 78


Attempts to activate a software-based Kofax Express license result in the following error:

9150 - Unable to contact license server. The underlying connection was closed: Could not establish trust relationship for the SSL / TLS secure channel.



This error can be caused by the following:

  • Proxy Server interfering with the secure connection between Express and the Licensing Server
  • TLS version mismatch between the Express station and the License server.
  • An issue with a security certificate installed on the Express station 



Use the Kofax Express License Activation page to activate the Kofax Express license.


Level of Complexity 



Applies to  

Product Version Build Environment Hardware
Kofax Express 3.2 ALL ALL N/A
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