Setting up user iCloud accounts within Network accounts

Hey All;

New to the server environment and have (I assume) successfully setup a Open Directory (for Network user accounts with network homes) server and I am able to successfully bind to it and login to a Network user account via a client mac.

I'm having an issue with setting up iCloud accounts in my user's Network accounts.

The iCloud preference panel is able to log into and setup all but mail. It seems that it creates the mail account settings, however when you attempt to launch Mail, it freezes and eventually asks to Rebuild mailbox information. When I select this option the application eventually quits.

I can setup the iCloud mail manually via Profile Manager for the specific user, however this in turns destroys the iCloud settings for other services.

Can anyone help?

Additional information:

Server: Mac pro, Yosemite 10.10.2 and Server 4.0.3

Mac Client: Mac mini, Yosemite 10.10.2