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On October 19, 2021, at ~5:40 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue impacting users in the European geo not being unable to join or create meetings.
If you had access to the Microsoft admin center, the issue reference # was TM292507.
On October 7, 2021, at ~9:25 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which some users were unable to make or receive PSTN calls.
Microsoft also indicated in this first notification that Europe was the only known impacted geo. The incident number for IT pros with admin center access was TM289868. The last outage/service interruption that Microsoft communicated was just 3 days ago (October 4th).
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.
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.