If you want to automatically display the Encoded ID without having to run a macro manually, you can use this method.

Setup a new Ticket Field

Create a HTTP Target

Create a trigger

{
"ticket":

{
"custom_fields": [{"id": INPUTFIELDIDHERE, "value":"[{{ticket.encoded_id}}]"}]
}
}

Now each time your trigger conditions are met, the ticket will display the Encoded ID as per below.