M365 Service Status (5 degradations at 2025-10-18 01:29)
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Users may be unexpectedly signed out from Outlook on the web when accessing shared mailboxes
Last Update: 2025-10-18 01:24(JST)
Next Update By: 2025-10-18 07:30(JST)
Status: Service Degradation
Affected Service: Exchange Online
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Some users have the new Outlook client open in their web browser instead of the Desktop client
Last Update: 2025-10-17 05:46(JST)
Next Update By: 2025-10-21 06:00(JST)
Status: Service Degradation
Affected Service: Exchange Online
As a workaround, users are able to use the classic Outlook to access
their Exchange Online mailbox.
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Users intermittently see blank Microsoft Word documents opening unexpectedly
Last Update: 2025-10-17 05:54(JST)
Next Update By: 2025-10-17 07:00(JST)
Status: Service Degradation
Affected Service: Microsoft 365 apps
This issue impacts Microsoft Word version 2508, build 19127.20302.
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Users may see that composed text is rendered in a different font once sent in Microsoft Teams
Start Time: 2025-09-16 12:30(JST)
Last Update: 2025-10-17 04:14(JST)
Next Update By: 2025-10-21 04:00(JST)
Status: Service Degradation
Affected Service: Microsoft Teams
Users report that impact is occurring on the Microsoft Teams web
client (Version: 25227.203.3915.2444) and the desktop client (Version:
25255.703.3978.7153).
Impact seems to be specific to text using SimSun fonts.
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Some users may experience blank visuals when exporting reports to PDF in Power BI Desktop
Last Update: 2025-10-15 09:40(JST)
Next Update By: 2025-10-15 10:30(JST)
Status: Service Degradation
Affected Service: Power BI
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Users may be unable to access the Microsoft Whiteboard service through the web and receive an error
Start Time: 2025-10-17 07:12(JST)
Last Update: 2025-10-17 12:03(JST)
Status: Service Restored
Affected Service: Microsoft 365 suite
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Users were unable to create Microsoft Teams town hall or webinar meetings when adding external presenter to the event
Start Time: 2025-10-16 07:15(JST)
Last Update: 2025-10-16 11:30(JST)
Status: Service Restored
Affected Service: Microsoft Teams
As a workaround, affected users may have been able to invite external
presenter to an event by creating the event first and once the event was
created, organizers could add external presenter and then save the event again.
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Users leveraging Surface Copilot + PC devices with Snapdragon Qualcomm processors can’t start video in Microsoft Teams
Start Time: 2025-07-23 04:00(JST)
Last Update: 2025-10-15 04:51(JST)
Status: Service Restored
Affected Service: Microsoft Teams
As a workaround, users could have mitigated this issue by turning off
Windows Studio effects until a fix was made available:
1. Select Start and then select Settings
2. Select Bluetooth & devices, then Cameras, and then Surface Camera Front
3. Expand the section for Windows Studio Effects and then turn off each effect.
The following articles detail the October 2025 driver update users need to
install to resolve impact:
https://support.microsoft.com/en-us/surface/surface-pro-11th-edition-update-history-f26dd8a1-9169-4f4a-ab0d-6a47d2f10e25
https://support.microsoft.com/en-us/surface/surface-laptop-7th-edition-update-history-fdadc3d1-87d4-4a58-bc2e-ec9d7e3af16e
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Some users may be unable to access Microsoft 365 applications
Start Time: 2025-10-13 04:30(JST)
Last Update: 2025-10-14 01:38(JST)
Status: Investigation Suspended
Affected Service: Microsoft 365 apps
When users attempt to access Microsoft 365 apps from the Office
homepage, the apps aren’t listed.
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Some users are unable to access Microsoft 365 apps
Last Update: 2025-10-13 06:12(JST)
Status: False Positive
Affected Service: Microsoft 365 suite
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Affected users may be unable to access Microsoft 365 services and features
Start Time: 2025-10-10 03:10(JST)
Last Update: 2025-10-10 04:56(JST)
Status: Service Restored
Affected Service: Microsoft 365 suite
Users attempting to access or use features within Microsoft Teams,
Exchange Online, Microsoft 365 admin center, and Windows 365 may have been
impacted.
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Users can’t send email or calendar events to OneNote through the “Send to OneNote” add-in in any Outlook client
Start Time: 2025-10-04 08:00(JST)
Last Update: 2025-10-09 12:48(JST)
Status: Service Restored
Affected Service: Microsoft 365 suite
When users attempted to save an email or calendar event, they
received a message that stated, “Error: Cannot save this item to a shared
notebook due to sensitivity label restrictions. Please save it to personal
notebook.”
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Some users’ Microsoft Power Automate flows that detect newly created Microsoft Teams posts aren’t triggering
Start Time: 2025-10-02 09:30(JST)
Last Update: 2025-10-09 09:27(JST)
Status: Service Restored
Affected Service: Microsoft Power Automate in Microsoft 365
