Sharing a calendar is a fairly technical operation in most versions of Outlook and has some rather strict prerequisites. What Judy was trying to find out is whether you meet those prerequisites -- specifically whether you use Microsoft Exchange as your mail server. That's your "platform." If you are not using Exchange and not using Outlook 2007, then your version of Outlook gives you no way to share calendars with others. You can look in Tools | E-mail Accounts to see what kind of mail accounts you're using.

It might also be useful to remember that everyone answering questions here is a volunteer. Also, in almost every case, the version of Outlook, mail account configuration, and other information is needed to provide a complete and helpful answer. Therefore, you can expect to be asked to provide more information. Furthermore, it is not possible to read minds to know the exact best way to phrase a question for a particular individual, especially as there are people from all over the world asking and answering questions. Rather than bite the hand that's trying to feed you information, you can simply ask for clarification. I've assumed that's what you really meant to do and provided that above, with a specific next step for you to follow.

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