Ok, so you mean direct links? Do you want to open the ticket on the Windows client (that’s also possible, but I can only describe it basically because we don’t use it), or any web client?
For the web clients, the syntax is as follows:
http://path/to/website/Default.aspx?case=[Id]
So if you use that link in mails sent out of POB, the recipients can click on it to see the ticket.