When Identity Management is installed with its CA certificate signed by an external CA, the installation is processed in 2 stages. In the first stage, a CSR is generated to be signed by an external CA. The second stage of the installation then accepts a file with the new signed certificate for the Identity Management CA and a certificate of the external CA. During the second stage of the installation, a signed Identity Management CA certificate subject is validated. However, there is a bug in the certificate subject validation procedure and its default value (O=$REALM, where $REALM is the realm of the new Identity Management installation) is never pulled. Consequently, the second stage of the installation process always fails unless the --subject option is specified. To work around this issue, add the following option for the second stage of the installation: --subject "O=$REALM" where $REALM is the realm of the new Identity Management installation. If a custom subject was used for the first stage of the installation, use its value instead. Using this work around, the certificate subject validation procedure succeeds and the installation continues as expected.