Outage in Microsoft 365
Some users may be unable to access their Exchange Online mailboxes through Outlook on the web
Resolved Minor
November 12, 2025 - Started 6 months ago
- Lasted about 2 hours
Incident Report
Title: Potential issues accessing mailboxes via one or more connection methods
User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods.
Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 minutes.
Components affected
Exchange OnlineTrusted by 1,000+ teams
Never miss outages in third-party dependencies
Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.
Latest Updates ( sorted recent to last )
6 months ago - at 11/12/2025 05:33PM
Title: Some users may be unable to access their Exchange Online mailboxes through Outlook on the web
User impact: Users may be unable to access their Exchange Online mailboxes through Outlook on the web.
Current status: We're reviewing service logs to identify the root cause of this event, so we can determine our next troubleshooting steps.
Scope of impact: Some users hosted in the Europe, Middle East or Africa regions attempting to access their Exchange Online mailboxes through Outlook on the web are impacted.
Next update by: Wednesday, November 12, 2025, at 7:00 PM UTC
6 months ago - at 11/12/2025 05:14PM
Title: Potential issues accessing mailboxes via one or more connection methods
User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods.
Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 minutes.
Latest Microsoft 365 outages
Users may not be able to load the search bar in Microsoft OneDrive - about 7 hours ago
Users may not be able to load the search bar in SharePoint Online sites - about 8 hours ago
Users may have been unable to access Microsoft 365 web-based services correctly when using Google Chrome - 15 days ago
Never miss outages in third-party dependencies
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 6320 services available
Integrations with
