Company A of 100 users is linked closely with Company B. They are separate companies. However both companies have many joint meetings and wish to co-ordinate a way of scheduling meetings in which they know all persons will be able to attend. They plan to do this by giving the organiser, who resides at Company A, access to the holidays and diaries of all the relevant people. Both companies have Internet mail access. The diary data must be no more than 1 day out of date.