To enable a CA (Certification Authority) on Windows Server 2003 R2 to use the unmodified subject (Relative Distinguished Name) that is supplied in the certificate request:
1. Open a CMD.EXE window.
2. Type the following commands, pressing Enter after each line:
Certutil –setreg ca\crlflags +CRLF_REBUILD_MODIFIED_SUBJECT_ONLY net stop certsvc net start certsvc