Freeradius 3 and strip username

[chose]

   Good afternoon,
   I use ntlm authorization, but the radius uses for ntlm authorization 
username at domain.tld as it is written in the authorization to eduroam. It 
is able to change User-Name variable only for the realm. Strip out 
@domain.tld ?
   Thanks and best regards
   J.Karliak

-- 
Ma domena pouziva zabezpeceni a kontrolu SPF (www.openspf.org) a
DomainKeys/DKIM (s ADSP) a implementaci DMARC. Pokud mate problemy s
dorucenim emailu, zacnete pouzivat metody overeni puvody emailu
zminene vyse. Dekuji.
My domain use SPF (www.openspf.org) and DomainKeys/DKIM (with ADSP)
policy and implementation of the DMARC. If you've problem with sending
emails to me, start using email origin methods mentioned above. Thank
you.