In a workflow I'm creating, I have an activity "Create Exchange Item" attempting to write an entry in a user's calendar. However, I can't get past the configuring of the web service. I keep getting the error (the title of this). I've configured LF Web access (see picture) as it should be, according to what I've googled. I'm sure this is an instance of Exchange being cranky. Can anyone help?
Thanks
John H