Hello, Version 12.5 has reached its end-of-life and is no longer supported. It is advisable to upgrade the Email Security Appliance to a version that is currently supported, which could potentially resolve the issue. For more information, please refe...

  Hello, After further review , ECDSA certificate should be supported in version 15.0.The Enhancement request appears to be not updated , please have a TAC case opened for further validation of this error message Kind Regards,

Please open a TAC case to have this escalated  as Efficacy problem and solve the False positive 

All appliances within the same allocation could be accessed with the same public key

Hello, To enable the CLI, you must follow these instructions in the article , create a public/private key pair and submit your public key with other details to Cisco through a TAC case. https://docs.ces.cisco.com/docs/ces-customer-cli-access Unfortun...