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Solution ID : SO26942

Error: SSL Error 61: You have not chosen to trust "Certificate Authority Signer", the issuer of the server's security certificate



This error may occur when an older version of Citrix Receiver (ICA) connects to a Citrix server with SHA-256 SSL certificate installed.  The Citrix Receiver (ICA) installed on a Windows client system does not support SHA-256 signature algorithm and will need to be updated.


To resolve this issue, the Citrix Receiver (ICA) on Windows client system must be running a minimum version of "Receiver for Windows 3.4".

No changes are needed to the certificate as this is a client error only.  Once updated the client will be able to connect.

For more information about Citrix Receiver for Windows, visit Citrix product documentation website