Dimitry thanks for the answer. What I could test if it doesn't work? The three computers are on the same domain. The Server 2016 is registered as a member of the domain on server 2008 (I regularly manage it in RDP using a domain user to log in).
I'm trying to connect with IBExpert with trusted authentication but I get always the same message: "Unsuccesfull execution caused by a system error that precludes successful execution of subsequent statements. Your user name and password are not defined. Ask your database administrator to set up a Firebird login." If I try with isql I get: "Statement failed, SQLSTATE = 28000 Your user name and password are not defined. Ask your database administrator to set up a Firebird login. Use CONNECT or CREATE DATABASE to specify a database" If I connect with the standard SYSDBA user name alla works fine. I could not understand what I'm missing...
