jdbc:sqlserver://IP_bancodedados:1433;databaseName=devfluig;instance=MSSQLSERVER

Você precisa conectar via dataSource? se for pode ser assim:

<datasources>
    <datasource jta="false" jndi-name="java:/jdbc/FluigDS" pool-name="FluigDS" enabled="true" use-java-context="false">
        <connection-url>jdbc:mysql://localhost:3306/fluig</connection-url>
        <driver>mysqlDriver</driver>
        <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
        <pool>
            <min-pool-size>10</min-pool-size>
            <max-pool-size>20</max-pool-size>
        </pool>
        <security>
            <user-name>root</user-name>
            <password>admin</password>
        </security>
        <validation>
            <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/>
            <validate-on-match>true</validate-on-match>
            <background-validation>false</background-validation>
        </validation>
        <statement>
            <share-prepared-statements>false</share-prepared-statements>
        </statement>
    </datasource>
    <drivers>
        <driver name="mysqlDriver" module="com.mysql">
            <driver-class>com.mysql.jdbc.Driver</driver-class>
        </driver>
    </drivers>
</datasources>