Why the password sync is very slow if using Azure AD Connect? Is there any solution can speed up the password synchronization?

Hi,

Due to the limitation of DirSync, I switched to Azure AD Connect recently. AD Connect do has some improvement compared to DirSync, however there is a serious problem which is not found if using DirSync.

The problem is, the password synchronization is very very slow which cost to 30 min ~ 1 hour while I only have 8 users in AD. The method I trigger the password sync is via powershell:

Set-ADSyncAADPasswordSyncConfiguration -SourceConnector $LocalConnector.Name -TargetConnector $AzureConnector.Name -Enable $True -ErrorAction Stop | Out-Null

Why it is so slow in Azure AD Connect? The password sync in DirSync is very quick. Is there any solution can reslove this?

PS, since the AD setting could be changed for the local ad connector, so I cannot rely on the auto password change detect feature of AD Connect to do password sync.

Thanks