User impact: Users may be unable to leverage one or more secondary functions within Outlook on the web.

More info: Users encountering this issue may experience impact to one or more of the following features within Outlook on the web:

– Search results and suggestions for Email, Calendar and Contacts
– Content Labeling Policy functionality
– SafeLinks settings
– Outlook add-in settings
– Favorite folder add/remove
– Subscribing to new published calendars
– Suggested email replies and attachments
– Roaming signature management
– Email translation
– Weather feature visibility and management within Outlook calendar
– Viewing and editing ToDo items, OneNote items, and activity notifications in the Outlook side pane
– Managing connected accounts
– Viewing meeting insights, related content, and meeting transcripts in calendar events
– Managing Outlook groups
– Viewing “Getting Started” tooltips and “What’s New” feature suggestions
– Viewing and editing Loop components.
– Some tenants with IP enforcement client access rules may be unable to access via Microsoft Cloud App Security (MCAS), which may prevent users from accessing their mailbox.

As a workaround for the signature issue, signatures can be added to email drafts manually, or be applied through the Outlook desktop client.

Current status: Our investigation has confirmed that a recent deployment, intended to resolve an unrelated issue by modifying the authentication pathway leveraged by the affected functionality, introduced an authentication issue that resulted in impact. We’re evaluating strategies to repair this issue.

Scope of impact: Your organization is affected by this event, and some users may be unable to leverage one or more secondary functions within Outlook on the web.

Start time: Monday, June 26, 2023, at 7:00 AM UTC

Root cause: A recent deployment, intended to resolve an unrelated issue by modifying the authentication pathway leveraged by the affected functionality, introduced an authentication issue that resulted in impact.

Next update by: Friday, July 7, 2023, at 8:00 PM UTC