I need usa rsync (or other tool) to synchronize data between nss volumes nightly in two servers in different cities.

I enabled extended attributes for both nss volumes and tested it I hace no problem to do rsync to copy data with permission in two volumes in the same server. But Im testing now to synchronize data between two different servers and the result is... copy data ok, but it doesn't copy permissions.

This is my concrete command:

rsync -A -X -av /media/nss/CLIENTES/MPP-CLIENTES -e ssh root@

Synchronize data but not permissions

Has anyone tried rsync for this and can help me?
(I need use rsync or something similar, not migfiles, I need do it bidirectional, synchronize changes in two servers)