Microsoft 365

Title: Some users may be unable to use classic Outlook when the Teams Meeting Add-in is enabled User impact: Users may be unable to use classic Outlook when the Teams Meeting Add-in is enabled. More info: Specifically, impacted users may experience crashes while using the classic Outlook on any client, or be unable to launch the service. While we work on the permanent fix, we recommend impacted users upgrade to the latest Outlook version. As a workaround, users can also perform an Online Repair of Office or update Outlook to the latest version to resolve the issue. Current status: We're analyzing support provided information to determine our next troubleshooting steps. Scope of impact: Some users that are attempting to use classic Outlook with the Microsoft Teams Meeting Add-in version 26043.2016.4478.2773 enabled may be impacted. This information may be updated as our investigation continues. Next update by: Tuesday, March 17, 2026, at 9:00 AM UTC

Title: Some users may be intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps User impact: Users may be intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps. More info: This issue impacts both the Android and iOS mobile app experiences. Current status: We're analyzing Outlook mobile logs to isolate the root cause of impact and establish a fix. Scope of impact: Impact may occur for some users intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps. Next update by: Thursday, March 19, 2026, at 4:30 PM UTC

Title: Some users experience errors when attempting to create shared mailboxes in Exchange Online User impact: Users experience errors when attempting to create shared mailboxes in Exchange Online. As a workaround users are able to create a user mailbox and convert it to a shared mailbox. Current status: We're analyzing support provided information to determine our next troubleshooting steps. Scope of impact: Your organization is affected by this event, and some users attempting to create shared mailboxes in Exchange Online may be impacted. Next update by: Friday, March 20, 2025, at 1:30 PM UTC

Title: Investigating user reports of issues with Microsoft 365 products User impact: We don't have details on impact yet. We're seeing an increase in user reported issues above our alerting threshold. Current status: We are reviewing service telemetry and available information to determine if there is an issue happening and we'll update this message shortly with our latest findings. This communication serves as a preliminary notification about a potential issue affecting your service.

Title: Some users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page User impact: Users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page. More info: The impacted web-client is office.com, and impacted Microsoft 365 Copilot web-clients are office.com/chat, m365.cloud.microsoft, m365.cloud.microsoft/chat and copilot.cloud.microsoft. Users can access Microsoft Copilot through application-based Microsoft Copilot services. This includes, but is not limited to: - Microsoft Copilot desktop app - Copilot in Microsoft Teams - Copilot in Office apps User may be able to leverage https://m365.cloud.microsoft/search, and should be able to sign in using this page. Once signed in, users can access the impacted web-based office.com and Copilot clients. Current status: We've identified that impact associated with MO1253428 has started to reoccur. We're reviewing traffic pattern telemetry and applying configuration changes to optimize connections and remediate impact. Scope of impact: Impact is specific to some users who are served through the affected infrastructure. Next update by: Tuesday, March 17, 2026, at 4:00 PM UTC

Title: Some users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page User impact: Users may be unable to access Office.com or the Microsoft 365 Copilot web sign‑in page. More info: The impacted web-client is office.com, and impacted Microsoft 365 Copilot web-clients are office.com/chat, m365.cloud.microsoft, m365.cloud.microsoft/chat and copilot.cloud.microsoft. Users can access Microsoft Copilot through application-based Microsoft Copilot services. This includes, but is not limited to: - Microsoft Copilot desktop app - Copilot in Microsoft Teams - Copilot in Office apps Current status: We've identified that a section of service infrastructure is not processing traffic efficiently. We're making configuration changes to remediate impact. Scope of impact: Impact is specific to some users who are served through the affected infrastructure. Next update by: Monday, March 16, 2026, at 4:30 PM UTC

Title: Potential issues accessing mailboxes via one or more connection methods User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods. Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 minutes.

Title: Some users may be unable to use classic Outlook when the Teams Meeting Add-in is enabled User impact: Users may be unable to use classic Outlook when the Teams Meeting Add-in is enabled. More info: Specifically, impacted users may experience crashes while using the classic Outlook on any client, or be unable to launch the service. While we work on the permanent fix, we recommend impacted users upgrade to the latest Outlook version. As a workaround, users can also perform an Online Repair of Office or update Outlook to the latest version to resolve the issue. Current status: We're analyzing support provided information to determine our next troubleshooting steps. Scope of impact: Some users that are attempting to use classic Outlook with the Microsoft Teams Meeting Add-in version 26043.2016.4478.2773 enabled may be impacted. This information may be updated as our investigation continues. Next update by: Tuesday, March 17, 2026, at 9:00 AM UTC

Title: Some users may be intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps User impact: Users may be intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps. More info: This issue impacts both the Android and iOS mobile app experiences. Current status: We're analyzing Outlook mobile logs to isolate the root cause of impact and establish a fix. Scope of impact: Impact may occur for some users intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps. Next update by: Thursday, March 19, 2026, at 4:30 PM UTC

Title: Some admins in the North American region may be unable to access the Microsoft 365 admin center User impact: Admins in the North American region may be unable to access the Microsoft 365 admin center. Current status: We're reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan. Scope of impact: Impact is specific to some admins located in the North American region attempting to access the admin center. Next update by: Friday, March 6, 2025, at 5:30 PM UTC

Users experiencing inaccessible SharePoint, Teams files, delayed emails, unresponsive admin consoles, and general website failures. Issue persists across multiple locations and platforms.

Multiple users report a recurring login issue, identified by error AADSTS50196, due to a client request loop. Microsoft365 mobile and Outlook performance also impaired.

Users report login issues, server errors, and slow app performance. Significant problems with SSL certificates and admin portal access.

Title: Some admins may be unable to access the SharePoint Online admin center User impact: Admins may be unable to access the SharePoint Online admin center. More info: Admins receive the following error message, "Sorry, something went wrong". Current status: We're investigating a potential issue with SharePoint Online and checking for impact to your organization. We'll provide an update within 30 minutes.

Title: Users can't access or use the Microsoft Copilot Chat web app User impact: Users can't access or use the Microsoft Copilot Chat web app. More info: This issue affects users accessing office.com and m365.cloud.microsoft. Current status: We're investigating a potential issue with Microsoft Copilot Chat and checking for impact to your organization. We'll provide an update within 60 minutes.

Title: Users in Australia may be unable to access various Microsoft 365 Apps or services from portal.office.com User impact: Users may be unable to access various Microsoft 365 Apps or services from portal.office.com. More info: This issue affects users accessing apps or services from portal.office.com and m365.cloud.microsoft.com. Current status: We've received reports indicating that users are unable to access Microsoft 365 Apps and services when attempting to access them from portal.office.com or m365.cloud.microsoft.com. We're reviewing the provided impact details and investigating service health telemetry to help contextualize the impact and inform our next troubleshooting steps. Scope of impact: Users in Australia attempting to access or use Microsoft 365 Apps and services may be impacted. This section may be updated as our investigation continues. Next update by: Monday, March 2, 2026, at 1:30 AM UTC

Title: We're looking into a potential problem impacting Microsoft 365 services User impact: We're checking for potential impact to your users. Current status: We're investigating a potential issue with the Microsoft 365 service and checking for impact to your organization. We'll provide an update within 30 minutes.