Issue Reported: 28/07/2021 01:48:00 PM
Microsoft Reference : MO273734
Issue Status: RESTORED
Issue Description: Users in Brazil can’t access or experience degraded functionality in some Microsoft 365 services.
Some affected impact scenarios may have included, but weren’t limited to, the following:
Users may have been unable to access their Exchange Online mailboxes via any connection method.
Users may have experienced message and notification delivery delays in Microsoft Teams. Users may have also been unable to update their presence or may have seen stale presence information for others.
Users may have been intermittently unable to access documents via Office for the web.
Users may have also have been unable to sign in, navigate sites, download, or upload files in SharePoint Online.
Scope of impact: Any user served through the affected section of infrastructure in Brazil may have been impacted.
Final Update – 28/07/2021 05:39:00 PM: Microsoft have identified a section of Azure AD traffic management networking infrastructure which wasn’t processing traffic as efficiently as expected, resulting in impact across multiple Microsoft 365 services. Microsoft have rerouted the affected traffic across alternative sections of networking infrastructure, and confirmed after monitoring network telemetry that the impact is now mitigated.