Microsoft 365 Alert – Service Degradation – Microsoft Copilot (Power Platform) – Microsoft Copilot Studio – Agents were unable to process end user PDFs files configured with the GPT-5 model – RESOLVED

Announcements Shagufta Naaz

08/04/2026 09:13:00 AM

NHSmail Reference: INC46792756

Microsoft Reference: PC1273509

Issue Status: RESOLVED

Issue Description: Microsoft Copilot Studio – Agents were unable to process end user PDFs files configured with the GPT-5 model.

Final Update: 08/04/2026 08:32:00 AM–A customer escalation alerted us to an issue where agents were unable to process end user PDF files that were configured with the GPT-5 model. After their investigation, they identified a code bug that was introduced as part of a recent service update as the source of the impact. They rolled back this deployment and confirmed via service health diagnostics that functionality was restored.

Scope of impact: This issue may potentially impact any user attempting to install user targeted apps in the Intune Company Portal. This information may be updated as our investigation continues.

Preliminary Root Cause: A code bug that was introduced as part of a recent service update as the source of the impact.

Next Steps: Microsoft are reviewing our standard service update procedures to avoid similar impact in the future.