Hello nuhi et al, I am wondering which Firewall component(s) is direct related to Microsoft Office. What I know is that if you remove firewall, then you can't open Office file (docx, xlsx, pptx etc) from Outlook, sometime can't even open the file directly. However there are 3 firewall components. Anyone has any idea why firewall is related to Office? and which one(s) are actually linked? TIA