Hi All! Frequent visitor, first time poster. I have recently did my first Mitel install with UCA. I was able to get most of the computers there running without much problem, except one. It is the only Windows 8.1 computer. The user can login with no problem, and can see all the extensions working off this system but it shows no phone or chat presence. By that I mean it doesn't show a picture of a green (or red) phone next to the user's name. There is just no (picture of a) phone at all. There is also no chat bubble (for those who are using UCA). As I said this station is using Windows 8.1, tomorrow I am bringing my Windows 8.1 laptop to test. Is anyone familiar with this issue? Is this a Windows 8.1 thing, or something else? I should also mention this user can not only login UCA, but also initiate calls by double clicking on a contact. I haven't tried initiating a chat from a different user, I will do that tomorrow. I tried looking for OS compatibility for UCA, but the best I could find says Windows 8, not 8.1.