Windows 2003 Server is supported at the latest BIOS A12.

 

http://support.dell.com/support/downloads/download.aspx?c=us&cs=555&l=en&s=biz&releaseid=R57946&SystemID=PWE_PNT_PII_4300&os=WNET&osl=en&deviceid=159&devlib=0&typecnt=1&vercnt=7&formatcnt=2&fileid=83059

Thanks for the reply.

 

for those interested, have a look at this link:

 

http://www1.us.dell.com/content/topics/global.aspx/alliances/en/os_certifications?c=us&cs=555&l=en&s=biz&~f=lg&~page=6&~tab=2 

 

Best Regards

 

Pierre