Exchange – Change OWA Login to Username Only
KB ID 0000861 Problem The procedure for changing the user login process from domainnameusername to just username, is a little different with Exchange 2013. Solution 1. Connect to the Exchange admin center > Servers > Virtual Directories > Select OWA > Edit. 2. Authentication > Select ‘User name only’ > Browse and select the domain > Save. 3. At the warning click OK > Windows Key+R > cmd {enter}...