Within Teamwork Desk, you can choose to include the ticket number in the subject line of your reply to a customer.
The ticket ID number is assigned by Teamwork Desk and will appear within brackets in the subject line:
- ' I hope you can help with my issue...'
To enable this, click your profile icon to the top right of the main navigation bar and select Settings.
In the Settings area, go to the General tab and select Site Settings from the left pane.
Under Message Settings, you will see an option to enable Include ticket number.
Once enabled, the ticket number will be included in your replies to the customer, and can be used for reference by them.
For more information, see: Creating a New Ticket from an Existing Ticket