Meet Now email template location?

[cbsarge]

Where is the template stored for the email that is generated when a user clicks on Meet Now in the Office Communicator client? Our client version is 3.5.6907.221 and our server is 2007 R2 Standard. We are using a custom port for the web conferencing and it isn't picked up in the email invitations. Rather than telling the users they need to edit the link each time I would like to fix it where it is encoded.

Thanks!