Adding integratedSecurity=true should do the trick.
{{JDBCConnString="jdbc:sqlserver://<<ServerName>>:1433;databaseName=<<DBName>>;integratedSecurity=true"}}
Be aware that it is the account that runs the simulator process which will be used to authenticate. If you're doing this from workstation then it is yourself, but for a serverside simulator it is often a technical account.
Cheers,
Danny
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