Automatic upload from garmin connect to endomondo

There is no upload from the Garmin account to Eldomondo. It works in the opposite direction. Eldomondo reads the data through the API from Garmin's server. Hence, there is no way to initiate the transfer on Garmin's side. It has to be done on the other side (Eldomondo),. Since I do not use Eldomondo, I cannot tell you whether there is such option there, but you should be looking for it there.

Well, that's explains everything. Thanks