Microsoft 365 Alert – Service Degradation – Microsoft Copilot (Microsoft 365) – Users intermittently may be unable to create Copilot Notebooks through Microsoft 365 Copilot – ONGOING

Announcements Shagufta Naaz

19/05/2026 08:55:00 AM

NHSmail Reference: INC46830016

Microsoft Reference: CP1315061

Issue Status: ONGOING

Issue Description: Users intermittently may be unable to create Copilot Notebooks through Copilot.

More info: Users affected by the issue may see a blank screen when attempting to create a Copilot Notebook.

Subsequent retries to create Copilot Notebooks may succeed.

Current Update: 19/05/2026 08:55:00 AM–Microsoft are further reviewing and assessing their options to determine whether they can safely expedite the release of their fix. At this time, the fix has entered the normal deployment process, and they expect it will complete by Thursday, May 21st, 2026.

Scope of impact: Impact is specific to some users attempting to launch the Microsoft Teams desktop client.

Root cause: A recent Copilot service update introduced a code issue resulting in users being intermittently unable to create Copilot Notebooks through Copilot.

Next update by: Friday, May 22, 2026, at 1:30 AM UTC