Set Exhange 2010 /2013 OWA 'LogonFormat' using PowerShell
Quick look at the curent setting using the 'GUI'. Exchange Admin Center - Servers - Virtual Directory select OWA virtual directory.
Now lets change the LogonFormat to 'User name only' using PowerShell
Set-OwaVirtualDirectory -LogonFormat 'UserName' -DefaultDomain 'ThatLazyAdmin.local' -Identity 'LazyEX-01\owa (Default Web Site)'
