I have a Windows 10 PC with Office 365 (desktop). I have Office 365 set to use my PC for storage by default, as I don't want my files backed up to the OneDrive at this time. I am not running Outlook.
However, I noticed a great deal of internet activity every time I booted my PC. A look at the applications indicated that it was Office 365 that was logging the internet activity.
Does anyone know what Office 365 is downloading (or uploading) on every boot?