Question : Lotus Domino Console

I was in the process of monitoring my Domino server via the Console when I noticed the follwing below. Does anyone know what this means...

08/19/2009 03:50:30 PM  iCalendar: Logging conversion of request from non-Notes source. Product ID: Microsoft Exchange Server 2007

Answer : Lotus Domino Console

iCalendar is a standard calendar format supported by (amongst others) Notes and Exchange. I guess the server was converting a calendar invitiation from an Exchange format to a Notes format.