The European Commission told Microsoft Corp. on Friday that it was “still not in compliance” with a 2004 antitrust ruling that ordered it to share information with rivals to make their software work with Microsoft servers.

The EU has already threatened the company with 2 million euros ($2.4 million) in daily fines, backdated to Dec. 15, and said it will make its final decision after a hearing for Microsoft to plead its case later this month.