Windows to MAC TeamViewer to RemoteDesktop : Issue with special characters

I have a windows box to which I can RDP from my MacBook.

On this MacBook, I have started TV and I am able to connect from my another windows machine to this MacBook. In this case I can send special characters as well we upper case characters to the macbook's apps. Copy paste is still using right click of the mouse.

Now if I access the Windows box via RDP from this TeamViewer session, the special characters as well as the uppercase letters are not propogated at all.

Here I have already checked that the "Actions / Send Key Combinations" on my windows machine from where the access starts, is checked.

Any way to ensure that I can access the RDP-ed machine properly with ease?

regards,
Mohan