Microsoft 365 Alert – Service Degradation – Microsoft 365 Suite – Some users may experience latency or intermittent failures fetching user contacts in multiple Microsoft 365 services – RESOLVED
08/07/2025 08:50:00 AM
NHSmail Reference: INC46574126
Microsoft Reference: MO1111064
Issue Status: RESOLVED
Issue Description: Some users may experience latency or intermittent failures fetching user contacts in multiple Microsoft 365 services.
More info: Affected services and scenarios include:
– Microsoft Teams users are unable to fetch user’s regional and language settings using the Profile API
– Exchange Online users experience latency or 503 “Service Unavailable” errors when attempting to view contact information in Exchange Online
Final Update: 09/07/2025 08:35:00 AM – Microsoft have reviewed the service health and confirmed it’s stabilized and impact has been successfully remediated.
Scope of impact: Users may experience latency or intermittent failures for user contact fetching across multiple Microsoft 365 services.
Root cause: A change implemented to the queue for fetching contact information is resulting in a spike in processing errors, as our service infrastructure is unable to handle the influx of information only going to one specific portion of infrastructure for processing.
Next steps: Microsoft are further reviewing the service infrastructure and their testing of configuration changes to help prevent similar impact in the future.
