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Azure Cloud Service- What is AAD-Connect and installation mode ?

In this blog, we will describe 'What is AAD Connect'. AAD Connect is azure cloud tool which is used to synchronized Active directory on premises with Azure AD directory. Like If you already have Active Directory on premises, the users and groups can by synchronized to your Azure AD directory by using a tool such as Azure Active Directory Connect. The precursor to AADConnect was the DirSync tool and Azure Active Directory Sync (AADSync). 

 AAD Connect can be installed into two modes which are listed below.

 1- Express mode 
2- Custom Mode 

Express Mode- 

This mode is applicable only in case of single forest topology. This mode uses PHS(Password Hash Synchronization) method to synch. This method is default option in this mode. it comes with auto upgrade. before installation you should be Azure Global Administrator, AD Domain Service Administrator. During the installation, AAD Connect setup a SQL Server Express Local DB instance.

Steps for the installation in Express mode are followings as listed below. 

1. Install Synchronization Engine 
2. Configure AAD Connector 
3. Configure connector 
4. Enable PHA 
5. Enable Auto upgrade 
6. Configure Synchronization Services on Computer.


Custom Mode- 

This mode is applicable in case of multiple forest. This mode comes with Multiple Single sign on methods which are listed below. Existing SQL database server can be used. 

 1- PHS(Password Hash Synchronization) 
 2- PTA(Password through Authentication) 
 3- ADFS 
 4- Pingfederate 
 5- Do not configure.
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