Thank you everybody for your answers.
Finally the problem got solved.
Apparently it was a space storage issue, after insisting a lot the DBA accepted to run the synchronization with his user and even tough he said that there was enough space in the disk when we ran the synchronization we saw that actually it wasn't, so he increased the space in disk and we decided to modify the views that the DM consumes in order to reduce the volumetry of the data.
So right now the DM is sinchronizing without problems.
Thank you