We often want to make quick announcements to our group of 20 people using Office Communicator, so we highlight a group of contacts and start a new IM session. However, only a maximum of 10 people are able to join the conversation; after the maximum number of people join, all other invitees get the message:
Cannot connect to the conference because it is full. Contact the conference leader for more information.
Is there a way to increase the maximum number of participants?