16-11-2021 05:31:00 AM (GMT)
Microsoft Reference : EX296418
Issue Status: RESTORED
Issue Description: Users are intermittently unable to access Exchange Online via third-party apps and integrations that leverage REST.
More info: This problem will impact only a small number of users for a brief period and only Representational State Transfer (REST) connection methods are affected by this issue. Affected users can still access their Exchange Online mailboxes through other connection methods such as the desktop client, Outlook on the web, and Outlook mobile.
Scope of impact: Your organization may be affected by this event, and some users accessing the Exchange Online service via REST connection methods may be impacted
Final Update – 30/11/2021 08:58:00 AM: Microsoft deployed their optimization enhancing the infrastructure’s ability to process traffic, and they have confirmed via monitoring service telemetry that impact is no longer occurring.