Entrust.net certificate renewal fails at stage 500 with the following error:
Post CSR failed with error: Invalid CSR – The certificate signing request (CSR) is invalid. The Common Name (CN) attribute is not formatted correctly. It must be a properly formatted IP address or domain name. (Error ID: CSR111).
The Common Name of the certificate is improperly formatted. This could be due to the CN starting with one character followed by a period.
Correct the CN and restart the certificate processing from beginning.