On March 23, 2023, at ~8:22 AM ET, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users with certain conditional access policies applied were unable to access any Microsoft 365 service.
For IT pros or system admins with Microsoft admin center "working" access, the incident number to reference for more complete details was MO531859.
On March 17, 2023, at approximately 6:45 AM ET, Microsoft announced via their Twitter account, @MSFT365status, that they had investigated an issue in which some users may have been unable to manage other users in the Microsoft Teams admin center.
On March 8, 2023, at ~2:50 PM ET, Microsoft tweeted (@MSFT365status) that they were investigating an issue impacting multiple Microsoft 365 services.
On March 1, 2023, at ~11:56 AM EST, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users were unable to access Microsoft Exchange Online mailboxes.
On March 1, 2023, at ~3:25 AM EST, Microsoft sent out a message on Twitter (@MSFT365status) that they were investigating an issue in which users in the Asia Pacific region (APAC) were unable to access Microsoft Exchange Online services and unable to access Microsoft Teams.
On February 7, 2023, at ~6:38 PM EST, Microsoft announced on Twitter (@MSFT365status) that they were investigating an issue affecting access to Microsoft Teams services and service functionality for users in the Asia-Pacific region. Initially, Microsoft provided a single service incident number, TM512596, for system admins to refence in the Microsoft Admin Center.
On February 6, 2023, at ~11:28 PM EST, Microsoft tweeted (@MSFT365status) that they were investigating an access and services issue for Outlook.
For IT pros and system admins with access to the Microsoft Admin Center, the service incident number was EX512238.
On January 25, 2023, at ~2:31 AM ET, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue impacting multiple Microsoft 365 services.
On January 17, 2023, at ~9:17 AM ET, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which some North America users were having Microsoft 365 access issues.
On January 13, 2023, at ~7:12 AM ET, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which some users were unable to "access" application shortcuts via the Windows Start menu and/or the Taskbar.