Fix for "Service FIMSynchronizationService was not found on computer" when installing AADConnect

You may see the following error when installing or configuring the GA release of Microsoft Azure Active Directory Connect (AADConnect):

An error occurred while analyzing your current settings. Service FIMSynchronizationService was not found on computer '.'.

This can happen if the server where AADConnect is being installed on has remnants of a Windows Azure Active Directory Sync (DirSync) installation in the registry. This may happen even if DirSync has been uninstalled previously.

• Open RegEdit and navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products
• Delete the 0C3FB95F67119A143800F5C52A83CDC0 key if it exists

• Delete the 3F1C9EE38DDCE34478C59E1C0FE14BA5 key if it exists

• Close RegEdit and retry your configuration

Credit for making me discover this goes to my super-awesome boss, Tom Pacyk.