Thanks Edward for the reply,
These users are already created in Exchange online and using office 365 for email and office applications. My doubt is, when I create a new Domain and Active Directory, I think, I have to sync the exchange online users to the Active Directory. Otherwise, do I have to create all these users again in to the Active Directory ? How can I enable Single sign on for the users ? I didn't intend to confuse you.. my thoughts..
Regards,
Abdul