Stephens,  Yes the iDrac7 supports Subject Alternative Name Certificates, but you will need to be certain the IP address that you specify in the iDrac should match the Subject Alternative Name field of your domain controller certificate if you have certificate validation enabled. Are you asking due to an issue you are having? Let me know and we can look at getting the issue resolved. If not, I hope this helps answer your question.
Are SAN (subject alternative name) certificates supported on iDRAC7 with 1.57.57 firmware?
iDRAC7 and SAN Certificates