Hello
so now you have a different error related to authentication of your user, the previous problem with just connecting to the server was solved.
Let us check what could be the issue there.
In the meanwhile:
+ You are not showing any password in your screenshot of the PA connection definition, I guess you tried also with the appropriate password?
+ Would you be able to try by creating another SQL Server user and then log into the database with the SQL Server authetication mechanism, not the Windows one?
Regards