Ok here we go,

I received a couple of messages on Twitter from Engineers saying they cannot access the ECP page after they finished configuring the Virtual Directories.

Problem:

When trying to access the ECP , it takes you to the OWA page and after providing your username and password it gives you a blank “HTTP 400 Error” page.

Cause:

You missed up your authentications methods my friend

Solution:

make sure that the authentication methods used by OWA and ECP are matching this is done by running the following

> Get-owavirtualdirectory | fl

make sure that you using “Form based Authentication” and “Basic Authentication”

3

do the same with ECP using the following command line

> Get-ECPVirtualDirectory | fl

4

If not then you just need to reconfigure the Authentications on both Virtual Directories, DONNOT use IIS use Exchange Management Shell.

For owa use the following

>Set-owavirtualdirectory -identity “owa <Default Web site>” -FormsAuthentication:$true

use the same also for ECP

>Set-ecpvirtualdirectory -identity “ecp <Default Web site>” -FormsAuthentication:$true

then restart your iis services using the following

>iisreset

once finished try to access your ECP page again and it should work now

if it didn’t make sure to run the same command lines but using “owa <Exchange Back End>” to make sure that both Default web site and Exchange back end website authentication methods are matching.

Cheers🙂