On September 29th at roughly ~2:15 pm UTC, Microsoft reported an issue where users may have been unable to connect to the Exchange Online service on their mobile devices.
Microsoft then reported that they had determined that corrective actions taken to address a previous issue had impacted Exchange ActiveSync and Microsoft was applying a fix to mitigate the impact.
On September 29th at roughly ~9:00 am UTC, Microsoft reported an issue where users may be unable to access SharePoint Online and OneDrive for Business.
Users confirmed they were experiencing this issue and expressed their frustration as this was one of many outages this week.
On September 28th at roughly ~9:45 pm UTC, Microsoft reported an issue affecting multiple Microsoft 365 services.
Microsoft reported that they were working to identify the full impact and that they would provide more information shortly.
On September 24th at roughly ~1:15 pm UTC, Microsoft reported an issue in which some users were not being able to receive email notifications through the SharePoint Online service.
On September 21st at roughly ~12:30 pm UTC, Microsoft reported an issue with some users being able to load Power Apps forms.
Although Microsoft reported that they had implemented a fix, many reported that they were still experiencing issues.
On September 17th at roughly ~12:30 pm UTC, Microsoft reported an issue with some users accessing the admin center in Microsoft Teams.
Many confirmed they were experience the issue and reported many of their tenants were experiencing the issue as well.
On August 31st at roughly ~4:30 pm UTC, Microsoft reported an issue with some users accessing Power Apps in Microsoft 365.
Many confirmed they were experience the issue and suggested an update may to be blame for the issues they were experiencing.
On August 27th at roughly ~8:30 am UTC, Microsoft reported an issue with some users receiving test notifications on their mobile devices.
Several hours later at ~6:00pm, Microsoft reported that the issue was specifically affecting Android users and that they were working to apply a mitigation.
On August 24th at roughly ~5:30 pm UTC, Microsoft reported an issue with users being unable to access the Admin Portal.
Shortly after, they reported that they had identified that a recently-applied update may have been the source of the issue and that they were attempting to revert the updates to mitigate impact.
On August 19th at roughly ~3:30 pm UTC, Microsoft reported an issue with users being unable to join Teams meetings.
Shortly after, they determined that any user attempting to join a Teams meeting hosted in North America could be impacted by the issue. They also reported that they had re-routed traffic to an alternative environment and had seen some recovery.