SharePoint .agent Files Stop Working March 2027: How to Upgrade Nov 2, 2026 By Mark In SmiKar Software Microsoft ends.agent files in SharePoint and OneDrive after March 2027 (MC1511052). Upgrade paths, the new button, Teams re-add and an admin checklist. Read Post SmiKar Software Blog Cloud DevOps Storage Read more about SharePoint .agent Files Stop Working March 2027: How to Upgrade