Microsoft 365 Alert – Service Degradation – OneDrive for Business – Some users incorrectly receive a security warning prompt when opening Excel or PowerPoint files in OneDrive for Business – RESOLVED

21/08/2024 08:48:00 AM

NHSmail Reference: INC45154404

Microsoft Reference: OD867515

Issue Status: RESOLVED

Issue Description: Some users incorrectly receive a security warning prompt when opening Excel or PowerPoint files in OneDrive for Business

More info: More specifically, users may incorrectly receive a security prompt when opening Word, Excel or PowerPoint files in their respective web apps within OneDrive for Business. Also, affected users may see the following message “This content presents a potential issue”.

While Microsoft are working to remediate impact, we recommend that users update their Microsoft 365 Office clients by accessing an application and selecting the following options:

File > Account > Microsoft 365 and Office Updates > Update Options > Update Now

Final Update: 21/10/2024 09:15:00 AM – Following Microsoft’s extensive service monitoring, they have confirmed that their fix deployment has remediated impact for a majority of users. For users that may continue to experience impact, updating the Microsoft 365 Office client has been confirmed to remediate the impact, the steps of which have been outlined in the More info statement of this communication.

Scope of impact: Impact is specific to some users who are served through infrastructure attempting to open Word, Excel or PowerPoint files in their respective OneDrive for Business web app.

Root cause: A necessary short-term fix for an unrelated issue was recently implemented, producing a security warning prompt when opening Excel, PowerPoint, or Word files in OneDrive for Business.

Next steps: Microsoft are further analyzing the offending short-term fix that resulted in impact to help us isolate similar issues during our pre-deployment testing and validation processes.