Despite Microsoft releasing licenses to peek at the source code for their server software, the EU is still not satisfied.. The EU says that making a decision now about the quality and worthiness of that code is immature.

"It would be premature to conclude that offering access to source codes would necessarily resolve the problem of compliance," said EU anti-trust spokesman Jonathan Todd. Competition Commissioner Neelie Kroes added that users needed more than just the code - they also need comprehensive instructions that would allow them to develop software compatible with Windows systems.
As a coders myself, I rarely am used to getting instructions or walkthroughs when it comes to foreign code. Usually, it's up to the originally coders to document properly and the new coder to be able to understand it. Still, making the code available in the first place is big change of heart for MS, and may change the outcome of these trials.