Users may be unable to access their mailbox using multiple Exchange Online connection methods.
- Status
- Eingeschränkt
- Funktion
- OWA - problem connecting
- Region
- Schweiz
- Beginn
- 12.11.2026, 11:05 Uhr
- Dauer
- 18 Std. 45 Min.
- Letztes Update
- 12.11.2026, 18:12 Uhr
- Nächstes Update
- 12.11.2026, 20:30 Uhr
Aktueller Stand
We've updated the More info section of this communication to add that users in Mexico may also be affected. analyzing error logs and telemetry to investigate further into the aforementioned unhealthy service infrastructure issue in order to identify a root cause and fully mitigate impact for this event.
Mehr Informationen
Impacted connection methods include, but aren't limited to:
- Exchange ActiveSync (EAS)
- Outlook on the web
Betroffen
Some users located in Switzerland and Mexico attempting to access their Exchange Online mailbox may be impacted. This section may be updated as our investigation continues.
Verlauf
Alle Updates von Microsoft zu dieser Meldung, das neuste zuoberst.
- 12.11.2026, 18:12 Uhr
We've updated the More info section of this communication to add that users in Mexico may also be affected. analyzing error logs and telemetry to investigate further into the aforementioned unhealthy service infrastructure issue in order to identify a root cause and fully mitigate impact for this event.
- 12.11.2026, 16:28 Uhr
We’ve identified that the issue is associated with unhealthy service infrastructure. The service is recovering, though recovery isn’t yet complete. We’re investigating what caused the affected infrastructure to become unhealthy.
- 12.11.2026, 12:47 Uhr
We've identified elevated resource utilization on a section of infrastructure responsible for facilitating Exchange Online access. We're reviewing telemetry to identify the source of the resource utilization and assessing available mitigation options to help remediate impact.
- 12.11.2026, 11:43 Uhr
We're reviewing service monitoring telemetry to isolate the root cause and determine our next troubleshooting steps.
- 12.11.2026, 11:23 Uhr
We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 minutes.
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