Outage in Microsoft 365
Some users may be unable to sign in to the Microsoft Defender XDR portal
Resolved Minor
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Outage Details
Components affected
Microsoft 365 suiteLatest Updates ( sorted recent to last )
Title: Some users may be unable to sign in to the Microsoft Defender XDR portal
User impact: Users may be unable to sign in to the Microsoft Defender XDR portal.
Current status: We're continuing to monitor the rollback of the previous update as it progresses. We expect this will remediate impact once completed.
Scope of impact: Any user may be impacted and may be unable to sign in to the Microsoft Defender XDR portal.
Start time: Tuesday, April 29, 2025, at 5:35 PM UTC
Root cause: A recent update to the authentication system that enables access to the Microsoft Defender XDR portal contains a configuration issue which is leading to impact.
Next update by: Wednesday, April 30, 2025, at 5:30 AM UTC
Title: Some users may be unable to sign in to the Microsoft Defender XDR portal
User impact: Users may be unable to sign in to the Microsoft Defender XDR portal.
Current status: We've investigated the affected service infrastructure and determined a recent update to the authentication system that enables access to the Microsoft Defender XDR portal contains a code issue which is leading to impact. We've initiated a rollback of this update to remediate the impact and we're continuing to analyze the service health to see if any additional actions may be required.
Scope of impact: Any user may be impacted and may be unable to sign in to the Microsoft Defender XDR portal.
Root cause: A recent update to the authentication system that enables access to the Microsoft Defender XDR portal contains a code issue which is leading to impact.
Next update by: Wednesday, April 30, 2025, at 3:30 AM UTC
Title: Some users may be unable to sign in to the Microsoft Defender XDR portal and get stuck in a loop
User impact: Users may be unable to sign in to the Microsoft Defender XDR portal and get stuck in a loop.
Current status: We're investigating a potential issue with Microsoft Defender XDR and checking for impact to your organization. We'll provide an update within 30 minutes.
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