Microsoft Shares Fall as Much as 3% in Premarket; Microsoft 365 Recovery Remains Uneven

Microsoft shares fell as much as 3% in premarket trading Friday; Microsoft 365 remained disrupted, with service capacity below normal and a timeline for full restoration unclear.

Microsoft's repair effort involved bringing systems back in phases and restoring traffic gradually, alongside work on affected infrastructure. Recovery remained uneven, and a timeline for full restoration remained unclear.

Earlier Friday, Microsoft said a patch to an authentication and routing component had begun improving stability in part of its infrastructure. The company was expanding the patch after initial gains but had not announced a full recovery by about 2:24 a.m. ET.

At the time of that update, Outlook and some Teams features that rely on Exchange Online remained affected. The disruption did not affect Teams calls, meetings, group chats or channel messaging.