I don't think I'll be able to help you, but I want to be sure I understand it correctly anyway.
Is this what you want?
- User opens a ticket
- Agent picks it up, set on low priority
- User or agent claims this has become an emergency
- Agent changes priority from Low to Emergency
- Lansweeper adds sysadmin@olgr.com and CTO@olgr.com as CC users on the ticket, and mails them the ticket history
- From this point on, the ticket continues with User, Agent, and Sysadmin and CTO as CC users.
Just a wild thought here, can't you do it with e-mail flow rules and a predetermined status update?
What happens if a third party replies to an existing ticket, does he get added as a CC?
If so, you could solve it like this:
You update the ticket with the text "Priority change, new status: critical".
You set up an e-mail flow rule to detect this text body, and BCC that message to sysadmin@olgr.com and CTO@olgr.com.
Have sysadmin and CTO have an e-mail flow rule that when they get such an e-mail, they reply (with subject intact) to lansweeperhelpdesk@olgr.com.
IF replying to someone else's helpdesk ticket puts you as CC, they'd then be included in the ticket.
Not sure if that would work though, but if you really need this it could be worth a test.