Title: Users may be unable to open .MSG files that contain specific character codes in the SharePoint Online document library
User impact: Users may be unable to open .MSG files that contain specific character codes in the SharePoint Online document library.
More info: Affected users see the following error message: “Hmm… looks like this file doesn’t have a preview we can show you.”
Users can bypass the issue by downloading and opening affected .MSG files in Outlook.
Current status: We’re working in parallel with the developers of the third-party, open source component responsible for the issue, and have confirmed they’ve developed a fix for the issue which is being prepared for deployment. We’re awaiting their confirmation of deployment and to confirm if additional steps will be needed from the SharePoint Online service to fully remediate impact for all users.
Scope of impact: This event may impact any users who attempt to open .MSG files that contain specific character codes in the SharePoint Online document library.
Start time: Friday, September 8, 2023, at 8:32 AM UTC
Root cause: A third-party open source component contains an issue that is preventing users from opening .MSG files that contain specific character codes.
Next update by: Wednesday, October 4, 2023, at 9:30 PM UTC
