Microsoft 365 Alert – Service Degradation – Power BI – Users may experience intermittent issues while refreshing the Gen1 Dataflows in Power BI – RESOLVED

Announcements Arpan Das

23/03/2026 09:17:00 AM

NHSmail Reference: INC46779300

Microsoft Reference: PB1259162

Issue Status: RESOLVED

Issue Description: Some users may experience intermittent issues while refreshing the Gen1 Dataflows in Power BI.

Final Update: 23/03/2026 11:49:00 AM – Microsoft has determined that a recent update intended to improve dataflow performance caused intermittent refresh issues. They have deployed a fix and confirmed through monitoring that the issue has been fully resolved.

Scope of impact: Your organization is affected by this event, and some users attempting to refresh Gen1 Dataflows in Power BI may be impacted.

Next Steps: Microsoft are reviewing our update procedures to better identify similar issues during our development and testing cycles.