AD Connect

Provide the password of the AD DS Connector account 

1. Start the Synchronization Service Manager (START → Synchronization Service). 

2. Go to the Connectors tab. 

3. Select the AD Connector that corresponds to your on-premises AD. ... 

4. Under Actions, select Properties. 

5. In the pop-up dialog, select Connect to Active Directory Forest: 

 

From <https://www.google.com/search?q=AD+Connect+change+synchronization+account&rlz=1C1ONGR_enUS963US963&oq=AD+Connect+change+synchronization+account&aqs=chrome..69i57.8829j0j7&sourceid=chrome&ie=UTF-8>  

 

 

 

AD ADD Sync 

Start-ADSyncSyncCycle -PolicyType Delta 

Get-date 

 

 

 

 

 

Reinstall: 

 

Found problems with reinstall and today I was able to work around it by removing these items to allow the installation to think it was not installed prior: 
 

Prior to today (4/5/2022) yesterday I uninstalled and then restarted the server overnight. 

 

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products 

Inside of this key was a couple of entries that linked to AD Connect.  In removed the sub-keys (not "Products") 

 

This folder must also be empty: 

C:\Program Files\Microsoft Azure AD Sync\Data 

 

Once those 2 areas were cleared I was able to get it to install.