EX1256020: Exchange Online Service Health Incident (Service Degradation)

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365 Service Alert

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Mar 19, 2026, 1:20:51 PMMar 19
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Some users are intermittently unable to access their Exchange Online mailboxes via the Outlook mobile apps.                                                                                                                                                                                                 
Microsoft

Some users are intermittently unable to access their Exchange Online mailboxes via the Outlook mobile apps

ID: EX1256020

Issue type: Incident

Status

Service Degradation

Impacted services

Exchange Online

Details

Title: Some users may be intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps

User impact: Users may be intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps.

More info: This issue impacts both the Android and iOS mobile app experiences.

Current status: We’re continuing our review of Outlook mobile logs and service telemetry to isolate the source of the issue and determine appropriate remediation actions.

Scope of impact: Impact may occur for some users intermittently unable to access their Exchange Online mailboxes with the Outlook mobile apps.

Next update by: Thursday, March 19, 2026, at 6:30 PM UTC

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