Subject Re: Trusted authentication for Firebird 2.5 where domain controller and db server are not the same
Author
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...