Hi @Anshu56 ,
1. You would either need to change the BR to After/Before instead of Display and trigger an event from BR and write the notification on event trigger.
2. Even if you've some criteria to write your code in Display BR, the code which you've written is not correct.
3. The condition in the notification should've been Assignment Group changes and Assignment Group is not empty instead of Assignment Group Changes or Assignment Group is empty.
Let us know your exact business scenario, what you are trying to achieve.
Is the scenario of your be :
Trigger a notification whenever the assignment group changes to Service Desk?
If this is the case, you don't need a BR. You can just change the condition of the notification mentioned above in point 3 with the table being incident(Table on which the filed is being changed to be precise).
One more point to note, if you are trying to send the mails from your personal developer instance then this functionality has been switched off from the past 6 months.
Please hit like button if my suggestion has helped you in any way.
Please mark correct if my response has solved your query.
Cheers,
Mohammed Basheer Ahmed.
