When I try to open an online file hosted on SharePoint through Excel 2010 (application not online), it shows me the 'Login into Office 365' pop up. I enter my hotmail address (for my MS account) into the email field and then it tries to redirect to the Microsoft Account Sign In Page.
But it then throws an error: "This operation has been canceled due to restrictions in effect on this computer. Please contact your system administrator."
I can open urls normally from within Excel.
The file can also be opened fine in the browser in Excel Online.
Windows 10, Excel 2010.
What's going on?