The directory service, take an important role in corporate services technology, when a company wants to take its servers to the cloud, has a big challenge in identity management.
What they say is that except Admin account under LDAP, all other User accounts shall be imported to Cloud.But only IAM of Eucalyptus cloud will be followed.
Thank you gentlemen, I think that the federation between cloud services and Onpremise services is very good choice too, so the integration is possible without third party tool.