In the VIP Gateway > Setting, the VIP Certificate or other SSL Certificate cannot be removed or changed.
Failed to delete 'certname'
When viewing the Cert:
Invalid input string format. Check the input for invalid characters and try again
Possible corruption in the VIP key store.
Note: An Active SSL cert cannot be deleted from the keystore while the SSL cert is in use. To avoid access denied errors, upload and install the new SSL certificate to VIP Manager, then set dependant VIP Services to use it before proceeding:
"C:\Program Files (x86)\Symantec\VIP_Enterprise_Gateway\jvm\bin\keytool" -list -keystore DEFAULT.
"C:\Program Files (x86)\Symantec\VIP_Enterprise_Gateway\jvm\bin\keytool" -delete -noprompt -alias <name of cert to be removed> -keystore DEFAULT.