When can we expect MS Groove to have a Word-tool?

I have understood that in earlier versions of Groove there was a MS Word-tool
that let Groove-users work on the same Word-document at the same time, real
time simultanious Word-editing in other words.

This must be a highly valued function to many Office/Groove-users so I just
can't understand why it has been removed. When can we expect it to be
implemented again?

Thanks
Markus (Sweden)