Create attribute using CLI /subsystem=resource-adapters/resource-adapter=test-adapter:add(archive=test-archive, transaction-support=NoTransaction) /subsystem=resource-adapters/resource-adapter=test-adapter/connection-definitions=test-definitions:add(jndi-name=java:/test-definitions,class-name=Testclass,enabled=false) /subsystem=resource-adapters/resource-adapter=test-adapter/connection-definitions=test-definitions:write-attribute(name=capacity-decrementer-class, value=org.jboss.jca.core.connectionmanager.pool.capacity.WatermarkDecrementer) /subsystem=resource-adapters/resource-adapter=test-adapter/connection-definitions=test-definitions:map-put(name=capacity-decrementer-properties, key=Watermark, value==33) Using web console navigate Configuration > Subsystems > Resource Adapters > test-adapter > View > Connection Definitions > Pool ... Capacity decrementer properties should contain Watermark = 13