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

Article # 3033116 - Page views: 362


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 


Solution 1

Use the instructions in the following KB article to enable TLS 1.2 support in Kofax Express 3.2:

TLS 1.2 Support in Kofax Express 3.2

Solution 2

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


Article # 3033116