You need to set the authentication method of the federation servers to forms-based authentication

Your company has a hybrid deployment of Office 365.
You need to set the authentication method of the federation servers to forms-based authentication.
What should you do?

A.
Modify the Web.config file in the %systemroot%\inetpub\adfs\ls directory.

B.
Modify the Global.asax file in the %systemroot%\inetpub\adfs\ls directory.

C.
From the AD FS 2.0 Management console, add a relaying party trust.

D.
From the AD FS 2.0 Management console, add a claims provider trust.

Explanation:

http://msdn.microsoft.com/en-us/library/xdt4thhy.aspx