Hi and thanks for the reply Nick

My fault i have do that exactelly

on TSM_SERVER1

DEFINE SERVER TSMSERVER2 SERVERPASSWORD=password> HLADDRESS=Ip 
LLADDRESS=port_tcp/ip

on TSMSERVER2

DEFINE SERVER TSM_SERVER1 SERVERPASSWORD=password> HLADDRESS=Ip 
LLADDRESS=port_tcp/ip

On the two server the admin and his password was the same

But when we try to ping server server1 on the 2 and vice-versa that not working
when we try on TSM_SERVER1
EXPORT POLICY testing_domaine toserver=TSMSERVER2 previewimport=yes

We have

ANR0561E EXPORT POLICY: Process aborted - sign on to server, TSMSERVER2,
failed.
ANR0985I Process 167 for EXPORT POLICY running in the BACKGROUND completed with
completion state FAILURE at 16:41:00.

That i actually have

+----------------------------------------------------------------------
|This was sent by bobpatrick808182 AT yahoo DOT fr via Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------