Outage in Microsoft 365
Some users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams
Resolved Minor
August 27, 2026 - Started 3 days ago
- Lasted about 9 hours
Incident Report
Summary AI Generated
A misconfigured authorization change intended to block unlicensed users inadvertently prevented some licensed Microsoft Teams users from signing in, with admins also unable to access organization-wide settings. The incident lasted approximately 22 minutes before Microsoft identified the root cause. A fix to revert the offending configuration change was being validated at the time of the update.
Title: Some users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams
User impact: Users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams.
More info: Additionally, admins may be unable to access organization-wide settings.
Current status: We’ve received reports that some users with an active Microsoft Teams license are unable to sign in to Microsoft Teams. Our assessment has determined that a recent authorization configuration change intended to block users without active licenses is resulting in impact. We’re validating a remediation action to revert the offending change and will provide a resolution timeline once available.
Scope of impact: Impact may occur for some users with an active Microsoft Teams license who are attempting to sign in to Microsoft Teams. This information may be updated as our investigation continues.
Root cause: A recent authorization configuration change intended to block users without active licenses inadvertently blocked some users with active Microsoft Teams licenses, resulting in impact.
Next update by: Thursday, August 27, 2026, at 10:30 PM UTC
User impact: Users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams.
More info: Additionally, admins may be unable to access organization-wide settings.
Current status: We’ve received reports that some users with an active Microsoft Teams license are unable to sign in to Microsoft Teams. Our assessment has determined that a recent authorization configuration change intended to block users without active licenses is resulting in impact. We’re validating a remediation action to revert the offending change and will provide a resolution timeline once available.
Scope of impact: Impact may occur for some users with an active Microsoft Teams license who are attempting to sign in to Microsoft Teams. This information may be updated as our investigation continues.
Root cause: A recent authorization configuration change intended to block users without active licenses inadvertently blocked some users with active Microsoft Teams licenses, resulting in impact.
Next update by: Thursday, August 27, 2026, at 10:30 PM UTC
Components affected
Microsoft TeamsTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
3 days ago - at 08/27/2026 09:59PM
Title: Some users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams
User impact: Users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams.
More info: Additionally, admins may be unable to access organization-wide settings.
Current status: We’ve initiated the reversion of the offending authorization configuration change and are monitoring the service to ensure it completes successfully. We’ll provide a resolution timeline once available.
Scope of impact: Impact may occur for some users with an active Microsoft Teams license who are attempting to sign in to Microsoft Teams. This information may be updated as our investigation continues.
Start time: Thursday, August 27, 2026, at 2:41 PM UTC
Root cause: A recent authorization configuration change intended to block users without active licenses inadvertently blocked some users with active Microsoft Teams licenses, resulting in impact.
Next update by: Friday, August 28, 2026, at 1:30 AM UTC
3 days ago - at 08/27/2026 09:16PM
Title: Some users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams
User impact: Users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams.
More info: Additionally, admins may be unable to access organization-wide settings.
Current status: We’ve received reports that some users with an active Microsoft Teams license are unable to sign in to Microsoft Teams. Our assessment has determined that a recent authorization configuration change intended to block users without active licenses is resulting in impact. We’re validating a remediation action to revert the offending change and will provide a resolution timeline once available.
Scope of impact: Impact may occur for some users with an active Microsoft Teams license who are attempting to sign in to Microsoft Teams. This information may be updated as our investigation continues.
Root cause: A recent authorization configuration change intended to block users without active licenses inadvertently blocked some users with active Microsoft Teams licenses, resulting in impact.
Next update by: Thursday, August 27, 2026, at 10:30 PM UTC
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