owa Authentication

Get-OwaVirtualDirectory

Set-OWAVirtualDirectory -Identity "cas\owa (Default Web Site)" -BasicAuthentication $true
Set-owavirtualdirectory -identity "cas\owa (Default Web Site)" -FormsAuthentication:$true

New-OWAVirtualDirectory -WebSiteName "FBA"
Enable the Basic authentication via running the following command:
Set-OWAVirtualDirectory -Identity "yourservername\owa (FBA)" -BasicAuthentication $true
Restart the IIS admin service in services.msc

Set-OwaVirtualDirectory "SERVERNAME\owa (Default Web Site)" -LogonFormat fulldomain

Set-EcpVirtualDirectory -Identity "cas\ecp (Default Web Site)" -Basicauthentication:$true
Set-EcpVirtualDirectory -Identity "cas\ecp (Default Web Site)" -Basicauthentication:$false



https://cas.temp.local/ecp/logoff.aspx?src=exch&url=https%3A%2F%2Fcas.temp.local%2Fecp%2F

--to fix ecp login and tmg

http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/39f93f01-ab78-41b7-9ef3-dcae8d727c97/

set-Owavirtualdirectory -identity "cas\owa (Default Web Site)" -WindowsAuthentication $True -Basicauthentication $false -Formsauthentication $false

iisreset /noforce

Add-PSSnapin *exchange*

Set-EcpVirtualDirectory -Identity "cas\ecp (Default Web Site)" -WindowsAuthentication $true -FormsAuthentication $false

iisreset /noforce