On October 13th, the uConnect Admins will be making a change to the Office 365 authorization standard. The change will affect newer Outlook clients (desktop and mobile) when you log into the service. There will be an expected one-time user impact for any device that has Modern Activation enabled by default. No email clients will be blocked from the service because of this change and functionality and service will continue for legacy Outlook applications. Learn more about this change.