Synchronize 

Microsoft Active Directory

 with 

Microsoft Azure

To allow 

Windows 10

 users to install online apps or to send apps protected by 

Microsoft Intune

 to 

iOS

 and 

Android

 devices, users must exist in the 

Microsoft Azure

Active Directory

. 

If you are using an on-premises 

Active Directory

, you

 must synchronize users and groups between your on-premises 

Active Directory

 and 

Azure

Active Directory

 using 

Microsoft Azure Active Directory Connect

. For more information, visit https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnect.