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: We’re developing and validating a fix to address this issue. We anticipate that the fix will be deployed to a subset of test users for further validation on Monday, July 10, 2023, and anticipate having a better estimation for the fix to reach all affected users by our next update.

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: Monday, July 10, 2023, at 8:00 PM UTC