Microsoft Outlook on the web Outage, June 6th, MO572252

The prior day incidents began with EX571516: Some users are unable to access Outlook on the web, and may experience issues with other Exchange Online services. Then they morphed into Incident MO571683: Some users are experiencing impact to multiple Microsoft 365 services and features. But that one didn’t seem to go away, and Microsoft infrastructure was impacted throughout the rest of the day according to Exoprise monitoring.

Here’s an example of our Outlook on web global coverage that was “lit up”, so to speak, early in the morning:

Continuous Global Coverage for Every Microsoft 365 App

Examine a sample of outages for Outlook on the web, and various Teams subsystems throughout the evening in US time or during operations for international locations:

Recovery Confirmation, Just as Important as Early Detection

Time and time again, we discuss with customers and channel partners how recovery confirmation is just as important as the early detection that comes with Exoprise services. Microsoft often indicates that an outage or disruption is recovered well before the recovery has been fully (or even partially) deployed. Exoprise CloudReady synthetic sensors fully emulate users accessing Microsoft Office 365 services, so you know when the recovery is really complete. Especially for your tenant.

Here’s a transcript of the latest outage, MO572252 (though it still seems like a continuation of yesterday’s outage):

June 5, 2023 12:21 PM EDT

Title: Some users are experiencing impact to multiple Microsoft 365 services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:
Exchange Online
– Users are unable to access Outlook on the web
– Users may also experience issues with the search function in Outlook on the web, Outlook desktop client and the Outlook mobile application
– Users may also experience issues using the Outlook mobile application

Microsoft Teams
– Users may have difficulties scheduling meetings and/or live events
– Users may have trouble loading people profile cards
– Users may have issues loading file lists
– Users may not be able to create new teams & channels
– Users may not be able to install apps
– Users may have trouble issuing searches
– Users may see delays in admin policy changes taking effect
– Users might see errors when using messaging extensions
– Users may not see up to date Presence information
– Teams Graph APIs may be impacted
– Assignments tab in Teams may not load
– Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Bookings, Microsoft Power Automate and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: After applying mitigations, we’re seeing availability return to healthy levels. We’re continuing to monitor the environment while we investigate the underlying cause, increase monitoring, and develop further fixes to provide additional relief.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Tuesday, June 6, 2023, 1:00 PM EDT

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