Forum Discussion
In Files tab getting Prefetch failure error
njagg785 Likes to be a network problem that's blocking one of the Office 365 IP required network addresses Office 365 URLs and IP address ranges - Microsoft 365 Enterprise | Microsoft Learn
Can you connect to a different network that doesn't have restrictions ?
- They are on Macbooks. Its happening at home and in the office. We tried on browsers on Windows machines as well
njagg785 I think from your other comments this is happening on multiple machines and multiple networks. Are there any exceptions where it does work? Is it just one site or all of them?
For some reason your users are not able to access SharePoint that provides the files tab to Teams, but the error message is far from helpful. You might see something more useful if you could browse to the SharePoint url for the specific site, look in SharePoint admin to find the URL. I'm hoping that you would see a more relevant error message. This would certainly show if some change had been made to SharePoint permission to remove the Team from access.
It could also be worth looking in the sign-in logs for these users in Azure AD, perhaps there is a Conditional Access policy that has been created that is blocking SharePoint, in their log it would show which policy was preventing access.