The European Court of First Instance has confirmed it will deliver its verdict on the Microsoft case on 17 September.
The verdict will be delivered in the Grande Salle of the Court of Justice at 9.30am.
Microsoft is appealing a decision made in 2004 which found it guilty of abusing its dominant position and fined the company €497m. The case hinged on Microsoft's refusal to hand interoperability information for workgroup servers to competitors and its bundling of its Media Player product with the Windows operating systems.
Microsoft's appeal was heard in April last year.
17 September is the last possible date the verdict can be delivered - court chairman Bo Vesterdorf retires the next day. ®