I am looking for a simple 3rd party application which will let me share my calendar in my mail account on my Exchange server with 2 people on a different exchange server/different domain. Another option is to share my calendar on my outlook or exchange server with my outlook account on the other exchange server. I do not want to use microsoft products because they only let you see free busy data. Also this isonly for 1 user so I do not need some enterprise product which costs many hundreds of dollars. They need to be able to see, change and modify appointments for me and I need to be able to do the same for the appointments added to my calendar by them.