Revit Automation Engine Upgrading to Revit 2026.5 and .NET 10 on September 21, 2026 zhong.wu@autod… 21 Aug 2026 Zhong Wu Share Autodesk Platform Services is preparing to update the Revit Automation engine to Revit 2026.5 on September 21, 2026 . This update will also move the engine runtime to .NET 10 . We are sharing this notice in advance so Revit Automation customers have time to validate their applications before the production update.