realm in User-Name stripped in accounting data?

Hi all, We setup proxy (on freeradius 2.1.3) by putting following lines in users and acct_users: DEFAULT Huntgroup-Name == Aruba, Aruba-Essid-Name == "Univ WiFi", Realm != "localream.mydomain", Proxy-to-realm := "remoteRealm" Authentication works properly while User-Name in accounting data, the @realm part is removed. However, there is no problem for other 'simple' proxy settings (only define realm in proxy.conf, without Proxy-to-realm). We're using LDAP as authentication backend. Would anyone please advise if we can keep the @realm part in all accounting data? Thanks a lot. /ST Wong