Step1: Activity configuration as shown below,
Message Field - "TestMessage1\t"+.Property2
Note : If you want to use the Param then initialize the param value in step1 and use it in step2 as
follows - "TestMessage1\t"+Param.myActivityParam
Step2: TestMessage1 message rule as follows,
Result: Property2 value 20170111 is displayed on the Property1 property as shown below,