RDC 4.6.6 at this time is only certified with IE, so for Windows 10 users we have come up with a simple procedure
to invoke RDC with IE.
Open the RDC login screen in Edge browser:
Then click on the three-dot menu on the right (see red arrow):
Select "Open with Internet Explorer" option (selected in red):
RDC login will now come up in IE.
and you will be able to log in RDC:
If you encounter any issue with the above procedure, although not supported by Oracle, please call (216 5734623)
or email (email@example.com) our Help Desk and we will try to help you to the best of our knowledge.