Email systems do not accept email generated by Online Rooms for external participant invite
NOTE: The D2L "Online Rooms" tool is currently in pilot phase at UWM. Use of this tool is limited to pilot participants. Instructor support is provided by the UWM Learning Technology Center; student support is provided by their class instructor.
Email systems are not accepting the external participant email invite generated by Online Rooms. This is because the "from" address, email@example.com, is not a legitimate return address.
D2L has confirmed that this is a bug. The Desire2learn.D2L "domain" that is used in the from address is a domain that D2L uses internally for all of their internal sites. This was probably used in testing and not changed when released.
For the time being, instructors should email external participants separately with the name and time of the room.
Source: [Learn@UW Utility] Service Announcements (02/12/2010)