Change string items encoding format into Windows 2012 ADCS inital CSR

Hello,

I'm trying, using OpenSSL "1.0.1e 11 Feb 2013" on Debian, to sign a Certificate Signing Request coming from a initial setup of a subordinate CA under Windows 2012 Active Directory Certificates Services. My problem is that ADCS encode string items of the CSR using "PRINTABLESTRING" format. I want to change the format used by ADCS to "UTF8STRING" because OpenSSL do not recognize the equality of the string items and then reject the CSR (I use a match policy settings for attributes comparison).

I cannot find any option the change the format. Is this change is possible ?

Thanks in advance :)

Dominique