Perform these steps to change the password for the service account that connects to the on-premises Active Directory:
- Open Azure AD Connects Synchronization Service from the Start Menu.
The Synchronization Service Manager window appears.
- Go to the Connectors tab.
- Select an AD Connector.
- From the Actions menu, select Properties.
The Connect to Active Directory Forest popup window appears.
- In the popup window, enter the new password for the service account.
- Click OK.
- Close the Synchronization Service Manager window.
- Open Services (services.msc).
- Select the Azure AD Connect Synchronization Service.
- Right-click the service and select Restart from the menu.
- Close the Services window. ...