
Is there any settings need to be done?

According to an IBM reference, we've added the user (from another domain) in TM1 as <username>@<userdomain>.
However, when we tried to integrated login, it prompted message 'Log In Failed: SystemServerClientNotFound'.

tm1s.cfg
SecurityPackageName=Kerberos
IntegratedSecurityMode=2
Reference
http://www-01.ibm.com/support/docview.w ... wg21456988
Remarks
The connectivity of those domains should be OK, since other applications already supported users from both domain.