Unhandled exception has occurred in your application Active Directory Sync tool

Unhandled exception has occurred in your application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately.
Access to the registry key 'HKEY_LOCAL-MACHINE\SOFTWARE\Microsoft\MSOLCoExistence' is denied

You will get above error when we launch Windows Azure Active Directory Sync tool configuration wizard.

The reason for this error is;
- The account does not have local administrative privileges
- The account does not have administrative access to the organisation Active Directroy

To resolve this issue;
- Use an account with local administrative permissions
- use an account with administrative access to the organisation Active Directory