M365 Service Status (0 degradation at 2025-12-09 05:53)
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Some users may be unable to open inbound Secure/Multipurpose Internet Mail Extensions (S/MIME) encrypted email messages
Start Time: 2025-11-30 09:00(JST)
Last Update: 2025-12-09 05:52(JST)
Status: Service Restored
Affected Service: Exchange Online
This issue affected users with the Dynamic Delivery policy enabled.
We previously disabled Dynamic Delivery “for S/MIME messages” while we worked to
resolve this issue, which has since been re-enabled.
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Some users may be unable to send refresh failure notifications in the Power BI Dataflow refresh settings page
Start Time: 2025-11-04 05:00(JST)
Last Update: 2025-12-08 04:29(JST)
Status: Service Restored
Affected Service: Power BI
Microsoft Fabric users may have been unable to see or select contacts
to send refresh failure notifications in the Microsoft Fabric Dataflow refresh
settings page for both Gen1 and Gen2.
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Users in Australia may experience issues accessing Microsoft services including Microsoft Teams and Microsoft 365.
Start Time: 2025-12-08 08:12(JST)
Last Update: 2025-12-08 09:41(JST)
Status: Service Restored
Affected Service: Microsoft 365 suite
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Users may have been unable to access the Microsoft Power BI and Microsoft Fabric services
Start Time: 2025-12-05 02:40(JST)
Last Update: 2025-12-06 09:49(JST)
Status: Service Restored
Affected Service: Power BI
Users hosted in the Norway West region that also had capacities in
this region would have temporarily experienced read-only mode while remediation
was in progress.
Previously, users located in other regions may have observed intermittent
slowness loading the Admin Portal, rendering the Capacity Metrics App, and
accessing license information in Workspace settings. This impact was mitigated
as of Friday, December 5, 2025, at 9:50 PM UTC.
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Users may be unable to open Excel files attached to email messages in new Outlook and receive an error
Start Time: 2025-11-15 05:00(JST)
Last Update: 2025-12-06 06:14(JST)
Status: Service Restored
Affected Service: Exchange Online
Users received an error stating: “Try opening the file again later.”
This issue impacted attachments that contained non-ASCII characters. As a way to
avoid impact, users with access to Outlook on the web could have used this to
bypass the impact or downloaded the file locally to manually open Excel files.
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Users may not be able to download Microsoft 365 desktop apps from the Microsoft 365 homepage
Start Time: 2025-12-03 02:21(JST)
Last Update: 2025-12-05 02:16(JST)
Status: Service Restored
Affected Service: Microsoft 365 apps
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Some users may be unable to open PDFs within SharePoint Online
Start Time: 2025-12-02 11:55(JST)
Last Update: 2025-12-03 01:05(JST)
Status: Service Restored
Affected Service: SharePoint Online
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Some users who are scheduling meetings may not receive accurate declined email messages in Exchange Online
Start Time: 2025-10-27 09:00(JST)
Last Update: 2025-12-02 03:49(JST)
Status: Service Restored
Affected Service: Exchange Online
Specifically, when users sent a meeting invitation that was declined
by a resource room, the email response may have been missing the Organizer’s
details.
While we were focused on remediation, impacted users may have been able to avoid
impact by utilizing the Auto Room Booking feature, which would show up
automatically if they have an active Copilot license when scheduling meetings
through the new Outlook desktop client, Outlook on the web, or Microsoft Teams.
After adding attendees and selecting a time for the meeting, organizers with
this feature available would see a “Add room with Copilot” button which would
enable Auto Room Booking. Once this was enabled, users would see “Copilot
Managed” and “Copilot will rebook if the room declines or the meeting was
rescheduled”. Additionally, when viewing the “Places finder”, it should also
show this feature as enabled, and when users click “Add a room or location”,
then “Browse all rooms”, users will see “Rebook declined rooms” toggled on.
In order to enable this feature, users must have an active Copilot license and
been scheduling meetings using the Outlook (new), Outlook on the web or
Microsoft Teams.
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Some users intermittently may not receive responses for their prompts in Microsoft Copilot (Microsoft 365)
Start Time: 2025-12-02 12:10(JST)
Last Update: 2025-12-02 04:01(JST)
Status: Service Restored
Affected Service: Microsoft Copilot (Microsoft 365)
Users may have received an error stating “Something went wrong” when
a response failed to generate. Requests that were successful may have completed
more slowly than usual.
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Some users may be intermittently unable to access their Exchange Online mailboxes using any connection method
Start Time: 2025-11-18 02:11(JST)
Last Update: 2025-12-02 02:53(JST)
Status: Service Restored
Affected Service: Exchange Online
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Some users in Brazil may have been unable to join Microsoft Teams meetings
Start Time: 2025-12-01 10:05(JST)
Last Update: 2025-12-02 12:15(JST)
Status: Service Restored
Affected Service: Microsoft Teams
