When using the newer streaming installers for Office 365 and Microsoft Office Online, you may encounter that install fails, that it cannot install or it cannot update Office.
This can be due to Sophos XG Web Filtering protection, it doesn’t like that traffic is being intercepted (Transparent proxy).
Luckily you can make an exception for this in the XG:
This is the regex code added in the “Target Domains” window:
Press save and it will work right away 🙂