Check out our previous post about AAD Connect:
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Azure Active Directory Connect (AD Connect) with Password Sync
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Azure Active Directory Connect (AD Connect)with Single Sign On
You may want to check out Getting Started with Azure Active Directory Connect from here:- https://azure.microsoft.com/en-us/documentation/articles/active-directory-aadconnect-get-started/
Click here https://www.microsoft.com/en-us/download/details.aspx?id=47594&751be11f-ede8-5a0c-058c-2ee190a24fa6=True