Forms and Field rules at Task level

Forms and Field rules at Task level

Hi,
 
We have a requirement as below.
 
We want Support group to be changed automatically when we change the technician of a SR. (We can achive this using Forms n Field rules).
 
But the same thing we have to achive for tasks. We couldnt find any such Forms and Field rules for Tasks.
 
Kindly help.

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