So in my current project I am working on deploying Office 365 in our Organisation. I had an issue in the early stages of testing where some users would get a pop up box (as below) asking for their credentials to activate the product. While this was not a showstopper, we did not want this coming up for every user once we go live with the rollout to over 1300 staff members. There were a few factors which caused this to happen and the fixes below. I was under the impression we were running Active Directory Federation Services. After speaking to one of the System Admins I found out we were actually running Seamless Single Sign On instead. To prevent this from coming up there were a couple of steps which I had to do. For Windows 10 systems it automatically supports AD SSO. For Windows 7 and 8.1 devices I had to install an extra piece of Software called Microsoft Workplace join for non Windows 10 computers here - https://www.microsoft.com/en-us/download/details.aspx?id=53554 On...