Some Outlook users find that cramming both their business and personal schedules into one calendar isn't very convenient. This is particularly true for users who share a calendar with colleagues or publish their calendar as a Web page for others to see.
If your users prefer to keep their personal calendars private, teach them how to create multiple calendars.
Creating a second calendar is extremely easy. Go to File | New | Folder, and designate that the new folder will contain Calendar Items. You can then place this calendar as a subfolder of almost any other folder, although making it a subfolder of the main calendar is probably your best bet.
After creating a second calendar, there are probably a number of personal appointments on the existing calendar that you don't want to re-create. Here are two simple ways to move items from one folder to the other.
Note: You won't receive any reminders from the items on the secondary calendar because Outlook reminders fire only from the primary (or default) folders and not from subfolders.