> We're investigating reports of users experiencing issues accessing Exchange Online mailboxes through multiple connection methods in the Americas. More details can be found in the Microsoft 365 admin center under EX1550543.

The page is showing a "Service Degredation" for "Microsoft 365 (Business or Enterprise)"

The detail says:

User impact: Users may be unable to connect to their mailboxes in Exchange Online through multiple connection methods.

More info: Potentially impacted connection methods may include:

- Outlook on the web

- Messaging API (MAPI)

- Exchange ActiveSync (EAS)

- Representational State Transfer (REST) API

Current status: We’ve identified connectivity errors occurring on a portion of Exchange Online infrastructure which receives and processes users’ access requests. We’ve collected networking logs to review to further investigate the source of these errors and confirm our next steps.

Scope of impact: This issue may affect users attempting to access their mailbox in Exchange Online using the affected connection methods.

Next update by: Thursday, November 12, 2026, at 8:00 PM UTC

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Aside: What with the nature of the Teams, OneDrive, etc, products being Sharepoint and Exchange in a trenchcoat this is probably creating quite a mess for services besides Exchange Online, too.

Edit: Looks like the status page needs a status page.