Trust between BE 2010 R3 agent and server

Hi,

BE client is scheduled to migrate from Win2003 to Win2008 R2. Thus BE agent need to reinstall in new server.

Since I have copied "C:\Program Files\Symantec\Backup Exec\Agents\RAWSx64" to new server. It will be installed after changed IP / hostname.

But how to I "Trust" this server after installed agent ?

Thanks