We see a major migration of internal IT services to the cloud, and IAM (Identity & Access Management) is one of them. Identity in the Cloud is also knows as IDaaS and no real open source solution is today available to built such solution. Well, almost none... We will see in this presentation how to run some OW2 softwares like LemonLDAP::NG, LSC, LDAP Tool Box or Fusion Directory to build such solution.