Thanks for reply...
I tried couple things like
1.write plugin on email creation in dynamic and if condition succeed then I throw the exception and email not created in CRM but problem is Outlook continue sending request for email creation so this will increase server load or outlook load
2. I have created flow and trying to update set regarding field as null in CRM and it's updated null but still in Outlook it's showing Set regarding field and tracking as well ..
Not sure Microsoft has provided such functionality to untrack specific record using
