When you try to integrate a Windows Server Essentials server with Microsoft Office 365 or Windows Azure Active Directory in a multiple domain controller environment, the integration process is blocked.
This problem occurs because a Windows Server Essentials server can be integrated with Office 365 or Windows Azure Active Directory only in a single domain controller environment.
The fix for this issue is included in the August 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
In Windows Server Essentials R2, all the online services integration features, including Azure Active Directory Integration and Office 365 Integration, are supported only in a single domain controller environment.
However, in Windows Server 2012 R2, it's quite common for the Windows Server Essentials Experiences server role to be deployed in larger IT environments where multiple domain controllers or Windows Server Essentials servers act as a domain member. To make Windows Server Essentials more effective in Windows Server and to encourage its deployment in larger IT environments, this update adds support for both Azure Active Directory integration and Office 365 integration features in the domain environment of a single domain controller, a multiple domain controller, or a member server.