This is a popular question today.
Unfortunately the text is hard coded into the Outlook plugin and therefore cannot be changed. However, there are at least a couple other ways to accomplish what you need:
- Give the user a clickable reminder via IM (Communicator). You could fire these in the same manner as Outlook, complete with snooze, etc. This can also be extended to all meeting reminders, which would be convenient if some or all users do not always have the Citrix window up and therefore miss reminders.
- Install a custom plugin on your Citrix server(s) that enables the link in the Live Meeting invitation and sends it as an IM to the user's Communicator client when they click it in Outlook.
There may be some other options as well depending on your environment and desired functionality. Let me know if you are interested in something like that - we can definitely help.