We are running a Windows 2012 R2 Server with Exchange 2013 installed. I have one user who has two exchange accounts. I have set them up separately in Outlook 2016 and Outlook 2010 running on Windows 10 and it will only retain one of the email accounts credentials. Once you put the other credentials in and and click remember, it overwrites the other account and will not retain both. Does anyone know of a solution for this?