On October 4, 2021, at ~7:28 pm UTC, Microsoft communicated via Tweet (@MSFT365status) that they were investigating an issue affecting user access for Outlook.
Initially, Microsoft communicated just a single incident number, EX289214. The last outage that Microsoft communicated was approximately a week ago (MFA issue, September 28th).
The incident number was MO287933.
Microsoft’s Office 365 has had a rough year when it comes to service outages. While every outage is different, one thing remains constant – disruption to your organization.
On August 26, 2021, at ~8:01 am UTC, Microsoft posted a notification (@MSFT365status) which indicated that they were investigating an issue in which user storage limits for OneDrive for Business were lower than expected.
The incident number was OD280960.
On July 30, 2021, at ~6:41 pm UTC, Microsoft announced that they were investigating an issue in which users potentially could be unable to connect to Power Apps.
The service incident number was MO274372. This announcement from Microsoft came just one day after a Microsoft 365 service disruption for users in Germany.
On July 29, 2021, at ~3:35 am UTC, Microsoft announced that they were looking into an issue in which users in Germany potentially could have access issues or degraded experiences for Microsoft 365 services.
The service incident number was MO273940.
On July 2, 2021, at ~9:47 am UTC, Microsoft indicated that they were investigating an issue in which users were experiencing latency or were unable to access multiple Microsoft 365 services.
The incident number was MO266345.
On June 14, 2021, at ~9:09 pm UTC, Microsoft indicated that they were investigating a Microsoft Teams issue impacting PSTN calls, with Australia as the impacted region. The service incident number was TM262155.
On June 11, 2021, at ~3:02 pm UTC, Microsoft began reporting a Microsoft Teams issue in which incoming calls were being sent straight to voicemail.
Approximately an hour later, Microsoft was reporting on issue identification and a remediation effort (rollback) was underway.
On June 10, 2021, at ~10:21 am UTC, Microsoft was reporting a Teams issue impacting North America.
Twitter responses soon followed confirming the impact was global. Users were confirming impacts to EMEA, APAC, and South America.