Q: I'm trying to connect to employee.gdb as configured in configuration database, but I keep getting the message that username and password are not defined for 'employee' database. I have absolutely no problem accessing those databases via dbexplorer or ibconsole using sysdba/masterkey.

A: Look what is configured in config database, if you try to replicate there is probably "REPL/repl" user, that you must register as SQL user.