Microsoft 365

Title: Some users may be unable to access Microsoft 365 web-based services correctly when using Google Chrome User impact: Users may be unable to access Microsoft 365 web-based services correctly when using Google Chrome. More info: Impacted users may experience Microsoft 365 web apps and portals not rendering as expected when accessed via the Google Chrome browser. This may include: - Missing UI elements such as search bars, pages or the Microsoft 365 admin center failing to load. - An inability to open Excel or PowerPoint files through Microsoft 365 web pages. - Issues accessing apps such as OneDrive and Planner following a recent Google Chrome update. Other browsers, including Microsoft Edge, appear to be unaffected. Current status: We’ve received reports indicating an issue with Microsoft 365 web-based services not rendering or appearing correctly when accessed via Google Chrome. We’re reviewing service monitoring telemetry to isolate the root cause and determine our next troubleshooting steps. Scope of impact: Your organization is affected by this event, and some users attempting to access Microsoft 365 web-based services via Google Chrome may be impacted. This information may be updated as our investigation continues. Next update by: Thursday, April 16, 2026, at 10:00 AM UTC

Title: Some users may be unable to access email messages in Outlook Mobile when connecting to Exchange on‑premises User impact: Users may be unable to access email messages in Outlook Mobile when connecting to Exchange on‑premises. Current status: We've identified that an authentication component misconfiguration is impacting the Autodiscover flow for Exchange on‑premises connections, which is preventing Outlook Mobile from automatically establishing access for affected users. We're developing a fix to correct misconfiguration and once complete, we'll validate its efficacy before deploying to affected environments. Scope of impact: Your organization is affected by this event, and some users attempting to access email messages in Outlook Mobile when connecting to Exchange on‑premises may be impacted. This information may be updated as our investigation continues. Start time: Friday, April 10, 2026, at 5:30 PM UTC Root cause: An authentication component misconfiguration is impacting the Autodiscover flow for Exchange on‑premises connections, which is preventing Outlook Mobile from automatically establishing access for affected users. Next update by: Monday, April 13, 2026, at 6:00 PM UTC

Title: Potential issues with multiple Microsoft 365 services User impact: We're investigating a potential issue with multiple Microsoft 365 services. Current status: We're investigating a potential issue with multiple Microsoft 365 services, including but not limited to Microsoft Teams and Exchange Online. We'll provide an update within 30 minutes.

Title: Investigating user reports of Microsoft 365 Admin Center issues in the United States 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 the Microsoft 365 web sign-in page and the Microsoft 365 Copilot web sign‑in page User impact: Users may be unable to access the Microsoft 365 web sign-in page and the Microsoft 365 Copilot web sign‑in page. More info: 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 Office.com. 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. Root cause: The infrastructure that supports access to the Microsoft 365 web sign-in page and the Microsoft 365 Copilot web sign-in page is not processing traffic efficiently, preventing some users from accessing the service pages. Next update by: Friday, April 3, 2026, at 12:30 AM UTC

Title: Users may be unable to access or have delays accessing the Microsoft 365 admin center User impact: Users may be unable to access or have delays accessing the Microsoft 365 admin center Current status: We're investigating reports of an issue in which users may be unable to access or have delays accessing the Microsoft 365 admin center. 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. Scope of impact: Any users attempting to access the Microsoft 365 admin center may be impacted. Next update by: Thursday, April 2, 2025, at 9:00 PM UTC

Title: Users may be intermittently unable to access their Exchange Online mailboxes in some connection methods User impact: Users may be intermittently unable to access their Exchange Online mailboxes in some connection methods. More info: This issue may intermittently impact some users who attempted to access the Exchange Online service through the Outlook mobile apps or the new Outlook for Mac desktop client. Current status: We've received reports from affected tenants that the impact scenario originally communicated through SHD EX1256020 is still ongoing. We're working to restart the Notification Broker service on affected portions of Exchange Online service infrastructure to remediate impact while we continue our analysis into the underlying root cause. Scope of impact: Impact may occur intermittently for some users accessing their Exchange Online mailboxes in the Outlook mobile apps or the new Outlook for Mac desktop client. This section may be updated as our investigation progresses. Next update by: Thursday, April 2, 2026, at 11:30 PM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: We're reviewing HTTP Archive format (HAR) network trace logs to help identify the root cause of the event, so we can determine our next troubleshooting steps. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Next update by: Tuesday, March 24, 2026, at 1:00 PM UTC