Skip to content
ThreatCluster

Exchange Admin Center Outage Due to Configuration Change

First seen 13 Oct 2026, 19:58 UTC • •
API

Article Content

Browse articles
ThreatCluster AI
ThreatCluster •October 14, 2026 at 19:36 UTC
  • •Microsoft confirmed a configuration change caused the Exchange Admin Center outage.
  • •Access was restored after rolling back the problematic configuration.
  • •The outage affected administrators trying to access the portal on October 12.

On October 12, 2026, Microsoft confirmed that a configuration change led to an outage of the Exchange Admin Center, preventing administrators from accessing the portal. The company initiated a rollback of the change, which successfully restored access. Reports indicated that administrators were encountering 'Internal Server Error' messages during this disruption. While Microsoft has confirmed the restoration of service, the exact duration of the outage and the number of affected users remain unspecified. The incident highlights the potential impact of configuration changes in critical systems.

Start a free Starter trial for enhanced analysis

Ask AI about this cluster

Updated 2d ago How this analysis works

Timeline

2026-10-12
Configuration change caused outage
Microsoft reported that a configuration change led to 'Internal Server Error' messages for administrators accessing the Exchange Admin Center.
Feeds.4Sysops
2026-10-12
Rollback initiated
Microsoft began rolling back the configuration change while investigating the outage, but service restoration was not confirmed immediately.
Feeds.4Sysops

More articles in this cluster (2)

Following this threat?

Track Microsoft in your own feed — you're alerted when they show up in new reporting, leak sites or exploitation.

Free account · no card needed

Extracted Entities (1)

1 / 2

Common questions

What caused the outage?
The outage was caused by a configuration change made by Microsoft.
Is the service restored?
Yes, access to the Exchange Admin Center was restored after rolling back the configuration change.
Who was affected by this issue?
Administrators attempting to access the Exchange Admin Center were affected by the outage.