Microsoft 365 admin users have access to diagnostics that can be run within the tenant to verify possible issues with accessing files shared in Teams chat. Microsoft 365 admin users have access to diagnostics that can be run within the tenant to verify possible issues with accessing files shared in Teams chat. Locate Limited-access user permission lockdown mode, and then select Deactivate.įor more information about Limited-access user permission lockdown mode, see Enable or disable site collection features.Under Features and storage, select Site Collection Features.Select OneDrive Settings > More Settings.Select the Setting icon in the upper-right corner of the screen.To fix this issue, deactivate this feature in OneDrive. Here is the image of a test message that I sent to myself. We recommend that you do not enable this feature on OneDrive sites. MSG files may be exported for the purposes of archiving and storage or scanning for malware. This file is also capable of storing mail hyperlinks and attachments. This is a site collection feature that helps prevent anonymous users from accessing application pages that are mostly helpful on classic, publishing-based SharePoint sites. An MSG file can contain ASCII signatures, text for the headers, or the main message body. In Internet Explorer 9 or a later version, if the file is delivered over HTTPS, and any response headers are set to prevent caching, and if the Do not save encrypted pages to disk option is set, a cache file is not created.
This issue occurs because the Limited-access user permission lockdown mode feature is activated on your OneDrive site. To download files, Internet Explorer must create a cache or temporary file. When the other user tries to open the file in Teams, the following error message is displayed: Then, the file is automatically stored on your OneDrive site. In Microsoft Teams, you share a file with another user in a chat window.