Some admins may be unable to access Activity Explorer in the Microsoft Purview portal

Title: Some admins may be unable to access Activity Explorer in the Microsoft Purview portal User impact: Admins may have been unable to access Activity Explorer in the Microsoft Purview portal. More info: Affected admins may have been unable to load Activity Explorer or may have seen it reporting as unavailable due to licensing checks incorrectly returning ineligible results. In some cases, admins may also have experienced issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client. Final status: Following our restarting of affected services, our internal service telemetry has verified that the impact has been remediated. Scope of impact: Some admins attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the AIP unified labeling client may have been impacted. Start time: Wednesday, April 1, 2026, at 12:00 AM UTC End time: Sunday, April 12, 2026, at 8:00 PM UTC Root cause: A recent service-to-service authentication component update disrupted how licensing information is validated, causing some requests to be identified as unlicensed and resulting in impact. Next steps: - We're further analyzing the isolated updated component to help us improve our pre-deployment testing and validations and, in our effort, to prevent similar issues in the future. This is the final update for the event.

Title: Some admins may be unable to access Activity Explorer in the Microsoft Purview portal User impact: Admins may be unable to access Activity Explorer in the Microsoft Purview portal. More info: Affected admins may be unable to load Activity Explorer or may see it reported as unavailable due to licensing checks incorrectly returning ineligible results. In some cases, admins may also experience issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client. Current status: We're continuing our efforts to restart all of the affected services to remediate the impact. We'll aim to provide a timeline for this process to complete by our next scheduled communications update. Scope of impact: Some admins attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the AIP unified labeling client may be impacted. This information may be updated as our investigation continues. Start time: Wednesday, April 1, 2026, at 12:00 AM UTC Root cause: A service-to-service authentication component was recently updated and is disrupting how licensing information is validated, causing some requests to be incorrectly identified as unlicensed and resulting in impact. Next update by: Monday, April 13, 2026, at 6:00 PM UTC

Title: Some admins may be unable to access Activity Explorer in the Microsoft Purview portal User impact: Admins may be unable to access Activity Explorer in the Microsoft Purview portal. More info: Affected admins may be unable to load Activity Explorer or may see it reported as unavailable due to licensing checks incorrectly returning ineligible results. In some cases, admins may also experience issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client. Current status: It's taking longer than anticipated but we're continuing to restart the affected services to remediate impact. We'll provide a remediation timeline if one becomes available. Scope of impact: Some admins attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the AIP unified labeling client may be impacted. This information may be updated as our investigation continues. Start time: Wednesday, April 1, 2026, at 12:00 AM UTC Root cause: A service-to-service authentication component was recently updated and is disrupting how licensing information is validated, causing some requests to be incorrectly identified as unlicensed and resulting in impact. Next update by: Saturday, April 11, 2026, at 6:00 PM UTC

Title: Some admins may be unable to access Activity Explorer in the Microsoft Purview portal User impact: Admins may be unable to access Activity Explorer in the Microsoft Purview portal. More info: Affected admins may be unable to load Activity Explorer or may see it reported as unavailable due to licensing checks incorrectly returning ineligible results. In some cases, admins may also experience issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client. Current status: We're progressing with our restarting of controlled services across the impacted environments which is expected to remediate the impact. Our restart timeline projects that the process will have completed and for impact to be remediated by our next scheduled communication update. Scope of impact: Some admins attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the AIP unified labeling client may be impacted. This information may be updated as our investigation continues. Start time: Wednesday, April 1, 2026, at 12:00 AM UTC Root cause: A service-to-service authentication component was recently updated and is disrupting how licensing information is validated, causing some requests to be incorrectly identified as unlicensed and resulting in impact. Next update by: Friday, April 10, 2026, at 6:00 PM UTC

Title: Some admins may be unable to access Activity Explorer in the Microsoft Purview portal User impact: Admins may be unable to access Activity Explorer in the Microsoft Purview portal. More info: Affected admins may be unable to load Activity Explorer or may see it reported as unavailable due to licensing checks incorrectly returning ineligible results. In some cases, admins may also experience issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client. Current status: We’ve successfully validated the controlled service restart process, confirming that the corrected certificate is loading as expected and licensing validation is recovering. We’re now proceeding with the restart across a broader set of impacted environments. We’re continuing to closely monitor recovery signals and will provide further updates as the expansion progresses. Scope of impact: Some admins attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the AIP unified labeling client may be impacted. This information may be updated as our investigation continues. Root cause: A service-to-service authentication component was recently updated and is disrupting how licensing information is validated, causing some requests to be incorrectly identified as unlicensed and resulting in impact. Next update by: Thursday, April 9, 2026, at 3:00 PM UTC

Title: Some admins may be unable to access Activity Explorer in the Microsoft Purview portal User impact: Admins may be unable to access Activity Explorer in the Microsoft Purview portal. More info: Affected admins may be unable to load Activity Explorer or may see it reported as unavailable due to licensing checks incorrectly returning ineligible results. In some cases, admins may also experience issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client. Current status: We’ve confirmed that the AIP unified labeling client is working as expected following the temporary mitigations that were applied. To further reduce impact, we’ve added additional service plans into the fallback licensing logic for Activity Explorer to minimize false “unlicensed” determinations while licensing validation is affected by the service-to-service authentication issue. We’ve also confirmed that restarting the affected backend services is required for the fix to fully take effect so the corrected certificate can be reloaded. A controlled service restart is now in progress, beginning with a limited scope to safely validate recovery before expanding more broadly. We’re continuing to closely monitor progress and will provide further updates as recovery continues. Scope of impact: Some admins attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the AIP unified labeling client may be impacted. This information may be updated as our investigation continues. Root cause: A service-to-service authentication component was recently updated and is disrupting how licensing information is validated, causing some requests to be incorrectly identified as unlicensed and resulting in impact. Next update by: Thursday, April 9, 2026, at 1:00 PM UTC

Title: Some admins may be unable to access Activity Explorer in the Microsoft Purview portal User impact: Admins may be unable to access Activity Explorer in the Microsoft Purview portal. More info: Affected admins may be unable to load Activity Explorer or may see it reported as unavailable due to licensing checks incorrectly returning ineligible results. In some cases, admins may also experience issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client. Current status: We’ve validated that restarting the affected services will fully resolve the issue. We’re in the process of restarting all impacted services so the fix can fully take effect. To reduce impact while this work continues, we’ve applied temporary mitigations for affected scenarios, including a change intended to reduce impact for users of the AIP unified labeling client. We’re continuing to monitor recovery and are validating the effectiveness of these mitigations with a sample of impacted admins. Scope of impact: Some admins attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the AIP unified labeling client may be impacted. This information may be updated as our investigation continues. Root cause: A service-to-service authentication component was recently updated and is disrupting how licensing information is validated, causing some requests to be incorrectly identified as unlicensed and resulting in impact. Next update by: Thursday, April 9, 2026, at 11:00 AM UTC

Title: Users may be unable to access activity explorer in the Microsoft Purview portal User impact: Users may be unable to access activity explorer in the Microsoft Purview portal. More info: Affected users may be unable to load Activity Explorer or may see it reported as unavailable due to licensing checks incorrectly returning ineligible results. In some cases, users may also experience issues retrieving sensitivity labels when using the Azure Information Protection (AIP) unified labeling client. Current status: We've determined that a network authentication component misconfiguration is causing impact to occur. We've fixed the misconfiguration and are restarting the affected services to mitigate impact. Scope of impact: Some users attempting to access Activity Explorer in the Microsoft Purview portal or retrieve sensitivity labels using the Azure Information Protection (AIP) unified labeling client may be impacted. This information may be updated as our investigation continues. Root cause: A network authentication component misconfiguration is causing impact to occur. Next update by: Thursday, April 9, 2026, at 9:00 AM UTC

Title: Users may be unable to access activity explorer in the Microsoft Purview portal User impact: Users may be unable to access activity explorer in the Microsoft Purview portal. Current status: We're investigating a potential issue with Microsoft Purview and checking for impact to your organization. We'll provide an update within 30 minutes.