Hello! I have found the solution to this Office update which breaks ActiveX controls in Excel by closing all Office apps, renaming .exd files, and reopening the file and trying the buttons again. That works for my regular Office installations. What I need to know which I cannot test as this is for a client, are there any alternative steps in the fix if the user is using Office 365 as opposed to normal single license deployments? And if they need to uninstall the update, does anyone know what the KB number is for the versions in Office 365 or are they the same as regular installations? Thanks!