Zendesk Note: This tip was submitted by a member of our Community and is not officially supported by Zendesk.
Please read this article for more information.
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Using HTTP targets, it is relatively simple to create a trigger to remove all CCs from a request.
Create the Target
Go to Admin > Extensions > Targets
Add Target > HTTP Target
Complete as below...

Create the Trigger
Go to Admin > Triggers > Add Trigger
Configure as below.
JSON is
{"ticket":
{"collaborators": "" }
}

Apply the Tag
Now all that is left is to apply the required tag 'remove_ccs'
This can be done using a specific macro which can simply add the tag.
Alternatively this could be added into any other macro.
NOTE: If the tag is added as part of a public comment, then the CCs WILL get the last message. If this is undesirable then the message should be empty or private.
Basic Macro
Go to Admin > Macros > Add Macro
Configure as below.

All done
To use this - simple apply the 'Remove CCs' macro.



Hey Peter!
Thanks for letting us know that you got it sorted and what the resolution was. :)