💡 Our Technical Review in summary
Service Health Advisory: Excel Web Data Accessibility
1. Summary
A compatibility issue was introduced during a recent Excel deployment, causing Excel data to fail to populate or display correctly across several Microsoft 365 web services. While the source files remained intact, the integration between Excel’s web access components and other platforms—specifically Power BI and SharePoint Online—was disrupted.
2. Impact
Users may have encountered difficulties viewing or accessing Excel data in the following scenarios:
- Power BI: Data within imported Excel workbooks in Power BI workspaces may have been invisible.
- SharePoint Online: Excel content hosted on SharePoint sites via web parts may have appeared blank or “greyed out.”
- General: Any Microsoft 365 service utilizing Excel web access may have failed to display data on the web.
3. Status
Current Status: Service Restored
Resolution: Microsoft has successfully deployed a fix to address the compatibility bug and confirmed the restoration of service through internal testing.
Incident Timeline:
- Start Time: January 29, 2026, at 4:00 PM UTC
- End Time: February 14, 2026, at 12:30 AM UTC
Root Cause: A recent deployment to the Excel service introduced a compatibility conflict with multiple Microsoft 365 web-based services, preventing data population.
Microsoft Official Issue Details
User Impact
Users may have been unable to access or see Excel data in multiple Microsoft 365 services on the web.
Status: serviceRestored
Service: Microsoft 365 suite
Classification: advisory
Origin: microsoft
Updates
- 2026-02-14 02:44
Title: Some users may be unable to access or see Excel data in multiple Microsoft 365 services on the webUser impact: Users may have been unable to access or see Excel data in multiple Microsoft 365 services on the web.
More info: Specific Microsoft 365 services affected were Power BI and SharePoint Online, though any Microsoft 365 service that utilized Excel web access may have been impacted.
The impact scenario for Power BI was that some users may have been unable to view data when they opened imported Excel workbooks in Power BI workspaces. To avoid this issue, users could’ve seen the data when they utilized workbooks in Excel or Excel for the web.
The impact scenario for SharePoint Online was that some users may have been unable to access or view Excel content on SharePoint Online sites because the content was blank and greyed out. To avoid this issue, users could’ve opened the Excel file directly without using web parts.
Final status: We’ve successfully deployed our fix to address this issue and confirmed in our testing environment that this issue is resolved.
Scope of impact: Some users who attempted to view or access Excel data in multiple Microsoft 365 services on the web may have been unable to do so.
Start time: Thursday, January 29, 2026, at 4:00 PM UTC
End time: Saturday, February 14, 2026, at 12:30 AM UTC
Root cause: A recent deployment in Excel introduced a compatibility issue with multiple Microsoft 365 services that prevented the data from being populated on the web.
Next steps:
– We’re reviewing our validation and updating procedures to better detect and prevent issues like this prior to deployment in the future.This is the final update for the event.
- 2026-02-12 21:49
Title: Some users may be unable to access or see Excel data in multiple Microsoft 365 services on the webUser impact: Users may be unable to access or see Excel data in multiple Microsoft 365 services on the web.
More info: Specific Microsoft 365 services affected are Power BI and SharePoint Online, though any Microsoft 365 service that uses Excel web access may be impacted.
The impact scenario for Power BI is that some users may be unable to view data when opening imported Excel workbooks in Power BI workspaces. To avoid this issue, users can see the data when opening workbooks in Excel or Excel for the web.
The impact scenario for SharePoint Online is that some users may be unable to access or view Excel content on SharePoint Online sites because the content is blank and greyed out. To avoid this issue, users can open the Excel file directly without using web parts.
Current status: Our additional analysis into the compatibility issues that were introduced by the recent change has determined that a fix deployment will be required to remove it and remediate the impact. We’re developing a fix and expect that an estimated timeline for the deployment will be available after our internal validations have confirmed it will remediate the impact.
Scope of impact: Some users attempting to view or access or see Excel data in multiple Microsoft 365 services on the web may be impacted. This information may be updated as our investigation continues.
Start time: Thursday, January 29, 2026, at 4:00 PM UTC
Root cause: A recent deployment in Excel introduced a compatibility issue with multiple Microsoft 365 services that’s preventing the data from populating on the web.
Next update by: Wednesday, February 18, 2026, at 10:00 PM UTC
- 2026-02-12 05:55
Title: Some users may be unable to access or see Excel data in multiple Microsoft 365 services on the webUser impact: Users may be unable to access or see Excel data in multiple Microsoft 365 services on the web.
More info: Specific Microsoft 365 services affected are Power BI and SharePoint Online, though any Microsoft 365 service that uses Excel web access may be impacted.
The impact scenario for Power BI is that some users may be unable to view data when opening imported Excel workbooks in Power BI workspaces. To avoid this issue, users can see the data when opening workbooks in Excel or Excel Online.
The impact scenario for SharePoint Online is that some users may be unable to access or view Excel content on SharePoint Online sites because the content is blank and greyed out. To avoid this issue, users can open the Excel file directly without using web parts.
Current status: We’ve received reports of an issue in which some users may be unable to access or see Excel data in multiple Microsoft 365 services on the web. We’ve identified a recent deployment in Excel introduced a compatibility issue with multiple Microsoft 365 services that’s preventing the data from populating on the web. We’re further reviewing the recent deployment to identify an efficient remediation plan. We anticipate being able to provide details on the proposed fix by our next scheduled update.
Scope of impact: Some users attempting to view or access or see Excel data in multiple Microsoft 365 services on the web may be impacted. This information may be updated as our investigation continues.
Root cause: A recent deployment in Excel introduced a compatibility issue with multiple Microsoft 365 services that’s preventing the data from populating on the web.
Next update by: Thursday, February 12, 2026, at 10:00 PM UTC
