What causes the SSL certificate error when activating licences?

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When activating a licence in ERP-Scale, the following error is displayed: “Error contacting web service: The underlying connection was closed. Could not establish trust relationship for the SSL/TLS secure channel”. Event messages may be logged in the Application log relating to crypt32. This is caused by a missing root certificate on the computer where the Pocket Programs activation relay is installed.

See the following KB article from Microsoft for further information:


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