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On January 4, 2022, at ~11:42 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating several issues involving users unable to access Planner and/or users unable to create and manage tasks in Microsoft Teams.
If you are an IT pro with Microsoft Admin Center access, the incident #'s were TM311556 and PL311494.
On December 15, 2021, at ~8:48 pm UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users were unable to access Outlook.
If you are an IT pro with Microsoft admin center access, the initial service incident # Microsoft disclosed was EX305722.
On December 2, 2021, at ~8:43 PM UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which mobile devices were being flooded with Microsoft admin center notifications. More importantly, they were also investigating reports that some system admins were experiencing delays or were unable to access the Microsoft admin center.
On November 22, 2021, at ~7:44 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users were unable to load images in Microsoft Teams chats or channels.
For IT professionals and system admins with Microsoft admin center access, the initial service incident # was TM299667.
On November 17, 2021, at ~4:06 pm UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users were experiencing access delays for Exchange Online, SharePoint Online, and Teams.
For IT professionals and system admins with Microsoft admin center access, the issue # was MO298798.
On November 17, 2021, at ~8:30 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users were unable to access Microsoft Forms.
For IT professionals and system admins with Microsoft admin center access, the issue # was FM298724.
On November 15, 2021, at ~10:09 pm UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users were unable to "see" the Microsoft Teams toolbar during calls.
For IT professionals and system admins with Microsoft admin center access, the issue # was TM298411.
On November 10, 2021, at ~10:11 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which admins were unable to adjust payment settings in the Microsoft admin center.
For IT pros with Microsoft admin center access, the issue # was MO297423.
On November 9, 2021, at ~10:11 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which some users may not be able to access some Microsoft 365 services when using Single Sign On (SSO) apps.
If you are an IT pro with Microsoft admin center access, the service incident number was MO297147.
On November 2, 2021, at ~11:44 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue involving users not being able to access files within Microsoft 365.
If you had access to the Microsoft admin center, the issue reference # was MO295728.