Microsoft 365 Alert – Service Degradation – Microsoft Bookings – Users may see blank pages when opening Microsoft Bookings – RESOLVED

Announcements Sharmista Mohanta

27/08/2026 09:16:00 AM

NHS.net Connect Reference: INC46920540

Microsoft Reference: MB1462509

Issue Status: RESOLVED

Issue Description: Users may see blank pages when opening Microsoft Bookings.

Final Update: 28/08/2026 08:55:00 AM – Microsoft has determined that Bookings APIs were getting timed out because of repeated deprecated KV cache look-ups after a change was enabled for deprecation of the KV cache. They have deployed a fix and confirmed with a sample of affected users that impact has been remediated.

Scope of impact: Any user may have seen blank pages when opening Microsoft Bookings.

Root cause: Bookings APIs were getting timed out because of repeated deprecated KV cache look-ups after a change was enabled for deprecation of the KV cache.

Next steps: Microsoft is reviewing their KV cache change procedures to help prevent the issue from reoccurring.