Exchange 2010 Database Restore

hi all,

i have Exchange 2010 DB backup taken one year back and i have restructured my Exchange server and DB's with DAG all is new(new servers and new DB's) and for sure users moved to the new DB's now i want to restore this old backup with out affecting my current setup as the mailboxes will be in both old and new DB's at the same time is that possible?

Thanks

Tarek Khairy